重庆大学19秋《高等数学（II-2）》在线作业-重庆大学网络教育学院-无忧答案网

aopeng 发表于 2019-6-21 11:21:17

重庆大学19秋《高等数学（II-2）》在线作业

《高等数学（II-2）》第1次
奥鹏作业答案可以联系QQ 761296021
1.[单选题]级数<img height="100" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/04b4f89d-fc8c-4623-b49b-4d1ecf459d51/20140706210335.jpg" width="201" border="0" alt="" />为( )
A.发散
B.条件收敛但不绝对收敛
C.绝对收敛但不条件收敛
D.绝对收敛且条件收
正确答案:——B——
2.[单选题]曲线 <img src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/0505b7cf-a9d3-46b8-8741-4de18f5f6b97/20140707212652.jpg" alt="" width="295" height="43" />在t=2处的切向量是（）。
A.(2,1, 4)
B.(4,3, 4)
C.0
D.(?4,3, 4)
正确答案:——A——
3.[单选题]二元函数<img height="74" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/0f2e1746-81e8-4f93-9b37-e8cca63fb76a/20140707203225.jpg" width="481" border="0" alt="" />的定义域是（）。
A.<IMG height=67 alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/0f2e1746-81e8-4f93-9b37-e8cca63fb76a/20140707203233.jpg" width=285 border=0>
B.<IMG height=62 alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/0f2e1746-81e8-4f93-9b37-e8cca63fb76a/20140707203239.jpg" width=269 border=0>
C.<IMG height=59 alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/0f2e1746-81e8-4f93-9b37-e8cca63fb76a/20140707203244.jpg" width=290 border=0>
D.<IMG height=65 alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/0f2e1746-81e8-4f93-9b37-e8cca63fb76a/20140707203250.jpg" width=272 border=0>
正确答案:——A——
4.[单选题]方程<img border="0" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/100f6bbb-7cf6-4ecf-ab05-1f90f3fd72b9/20140707140121.jpg" width="427" height="84" alt="" />表示的曲面是（）。
A.圆
B.椭球
C.抛物面
D.球面
正确答案:————
5.[单选题]平面4y－7z=0的位置特点是（）
A.平行于z轴
B.垂直于x轴
C.平行于y轴
D.通过x轴
正确答案:————
6.[单选题]若满足<img height="93" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/2a8a0eab-f856-4793-92bf-c4ac621cb86a/20140706205341.jpg" width="335" border="0" alt="" />，则交错级数 <img height="96" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/2a8a0eab-f856-4793-92bf-c4ac621cb86a/20140706205355.jpg" width="235" border="0" alt="" />。
A.一定发散
B.一定收敛
C.可收敛也可发散
D.难以确定
正确答案:————
7.[单选题]设<img width="286" height="108" alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/513e0bea-7ba4-460d-9dee-e930d43f99d9/20140709155725.jpg" /> ，当a=（）时<img width="404" height="105" alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/513e0bea-7ba4-460d-9dee-e930d43f99d9/20140709155737.jpg" /> 。
A.1
B.<img width="93" height="101" alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/513e0bea-7ba4-460d-9dee-e930d43f99d9/20140709155756.jpg" />
C.<img width="103" height="118" alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/513e0bea-7ba4-460d-9dee-e930d43f99d9/20140709155804.jpg" />
D.<img width="108" height="115" alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/513e0bea-7ba4-460d-9dee-e930d43f99d9/20140709155813.jpg" />
正确答案:————
8.[单选题]当D是由（）围成的区域时，<img width="59" height="20" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/51d3b997-0854-4104-a14e-4204ec72b972/20190128211453649001.png" /> = 2。
A.x轴，y轴及2x+y-2=0
B.x=1，x=2及y=3，y=4
C.|x|=<img width="10" height="20" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/51d3b997-0854-4104-a14e-4204ec72b972/20190228160404380001.png" />,|y|=<img width="10" height="20" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/51d3b997-0854-4104-a14e-4204ec72b972/20190228160513819001.png" />
D.|x+y|=1,|x-y|=1
正确答案:————
9.[单选题]曲面<img height="60" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/7bf67349-b75b-48ce-bf1b-ac95c4c6644c/20140707213446.jpg" width="146" border="0" alt="" />的一个法向量为（）。
A.<IMG height=76 alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/7bf67349-b75b-48ce-bf1b-ac95c4c6644c/20140707213456.jpg" width=179 border=0>
B.<IMG height=67 alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/7bf67349-b75b-48ce-bf1b-ac95c4c6644c/20140707213504.jpg" width=274 border=0>
C.<IMG height=70 alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/7bf67349-b75b-48ce-bf1b-ac95c4c6644c/20140707213511.jpg" width=197 border=0>
D.<IMG height=70 alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/7bf67349-b75b-48ce-bf1b-ac95c4c6644c/20140707213517.jpg" width=192 border=0>
正确答案:————
10.[单选题]下列一阶微分方程中哪个不是可分离变量的微分方程（）。
A.<IMG height=91 alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/8f98e45d-c665-4443-b20c-9583345cc465/20140706112643.jpg" width=288 border=0>
B.<IMG height=81 alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/8f98e45d-c665-4443-b20c-9583345cc465/20140706112653.jpg" width=258 border=0>
C.<IMG height=90 alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/8f98e45d-c665-4443-b20c-9583345cc465/20140706112701.jpg" width=156 border=0>
D.<IMG height=95 alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/8f98e45d-c665-4443-b20c-9583345cc465/20140706112709.jpg" width=435 border=0>
正确答案:————
11.[单选题]下列方程中表示椭球面的是（）。
A.<IMG border=0 alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/b02b12aa-a760-4b09-b4d9-9509795c9586/20140707172304.jpg" width=299 height=93>
B.<IMG border=0 alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/b02b12aa-a760-4b09-b4d9-9509795c9586/20140707172316.jpg" width=293 height=89>
C.<IMG border=0 alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/b02b12aa-a760-4b09-b4d9-9509795c9586/20140707172324.jpg" width=268 height=104>
D.<IMG border=0 alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/b02b12aa-a760-4b09-b4d9-9509795c9586/20140707172332.jpg" width=319 height=100>
正确答案:————
12.[单选题]下列平面中，垂直于Z轴的是（）。
A.x＋y＋z = 0
B.z = 4
C.5x－6y = 1
D.y－z = 1
正确答案:————
13.[单选题]求解微分方程<img height="78" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/b120c37f-ab02-4753-9eac-2c2e9a977ad5/20140706103842.jpg" width="198" border="0" alt="" /> 的通解的Matlab命令为( )。
A.y=dsolve ('Dy=x+y+1','x')
B.y=dsolve ('Dy=x+y+1')
C.y=dsolve (y'=x+y+1')
D.y=dsolve ('y'=x+y+1','x')
正确答案:————
14.[单选题]求解微分方程 <img src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/cac29977-8b98-4f96-9a84-d4cc7a5c8abf/20140706123629.jpg" alt="" width="293" height="88" />使用变换 <img src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/cac29977-8b98-4f96-9a84-d4cc7a5c8abf/20140706123644.jpg" alt="" width="114" height="73" />降阶得到的方程是（）。
A.<img alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/cac29977-8b98-4f96-9a84-d4cc7a5c8abf/20140706124005.jpg" width="276" height="98" />
B.<img alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/cac29977-8b98-4f96-9a84-d4cc7a5c8abf/20140706123733.jpg" width="262" height="106" />
C.<img alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/cac29977-8b98-4f96-9a84-d4cc7a5c8abf/20140706123745.jpg" width="270" height="94" />
D.<img alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/cac29977-8b98-4f96-9a84-d4cc7a5c8abf/20140706123757.jpg" width="267" height="117" />
正确答案:————
15.[单选题]级数<img src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/cb40034d-cdde-4b06-a7ab-26a27dd4d2b7/20140706144935.jpg" alt="" width="468" height="108" />的和为（）
A.1
B.<img src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/cb40034d-cdde-4b06-a7ab-26a27dd4d2b7/20190225144422311001.png" width="10" height="38" /> 
C.<img src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/cb40034d-cdde-4b06-a7ab-26a27dd4d2b7/20190225144648944001.png" width="10" height="38" />
D.2
正确答案:————
16.[判断题]椭圆抛物面<img height="82" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/422e7a2a-6a75-4165-9006-e14d093f1a5b/20140707184202.jpg" width="161" border="0" alt="" />可以通过抛物线 <img height="78" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/422e7a2a-6a75-4165-9006-e14d093f1a5b/20140707184212.jpg" width="123" border="0" alt="" />绕z轴旋转得到。( )
A.正确
B.错误
正确答案:————
17.[判断题]将yoz坐标面上的直线<img border="0" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/a1da0bc3-802b-4da7-adfd-1d86f9078d0f/20140707145455.jpg" width="228" height="94" alt="" />绕z轴旋转一周，所得的旋转曲面方程<img border="0" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/a1da0bc3-802b-4da7-adfd-1d86f9078d0f/20140707145507.jpg" width="279" height="114" alt="" />。（）
A.正确
B.错误
正确答案:————
18.[判断题]贝努利方程<img height="96" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/aa6024bb-bd4c-4969-98a8-25e0cc73083c/20140706120529.jpg" width="176" border="0" alt="" />的通解为<img height="92" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/aa6024bb-bd4c-4969-98a8-25e0cc73083c/20140706120538.jpg" width="226" border="0" alt="" />。
A.正确
B.错误
正确答案:————
19.[判断题]曲面 <img height="89" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/d769b19f-15f9-4a06-ac18-df62f896dc28/20140707213615.jpg" width="185" border="0" alt="" />在点(1,2,3)处的法线方程为<img height="105" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/d769b19f-15f9-4a06-ac18-df62f896dc28/20140707213622.jpg" width="246" border="0" alt="" /> 。( )
A.正确
B.错误
正确答案:————
20.[判断题]<img height="73" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/eab21833-7053-4fa6-9669-e4d55b02afe4/20140707210148.jpg" width="281" border="0" alt="" /><img height="83" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/eab21833-7053-4fa6-9669-e4d55b02afe4/20140707210201.jpg" width="45" border="0" alt="" /> = <img height="70" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/eab21833-7053-4fa6-9669-e4d55b02afe4/20140707210210.jpg" width="121" border="0" alt="" /> 。（）
A.正确
B.错误
正确答案:————
21.[主观题]点(2,4,1)到直线<img src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/0b431827-dc1e-400a-b02b-1d206aff20f4/20140707170445.jpg" width="242" height="113" alt="" />的距离为___________。

正确答案:————
22.[主观题]二阶齐次微分方程<img width="308" height="80" alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/1d92b100-bec5-404f-aaa3-e2c89fc079f4/20140710160940.jpg" /> 的通解为___________。

正确答案:————
23.[主观题]<img width="113" height="69" alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/2bf7afb9-9209-4936-b4ce-7b5425931a98/20140707210504.jpg" />， <img width="78" height="79" alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/2bf7afb9-9209-4936-b4ce-7b5425931a98/20140707210514.jpg" /> =____________。

正确答案:————
24.[主观题]级数<img width="314" height="133" alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/871e4291-a62c-45b0-bd1e-0334267398da/20140706151230.jpg" />的敛散性为_____________。

正确答案:————
25.[主观题]求曲线<img width="353" height="73" alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/978bad64-70bb-4c57-8b9b-90034bec234a/20140710142823.jpg" /> 在对应于 <img width="115" height="86" alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/978bad64-70bb-4c57-8b9b-90034bec234a/20140710142833.jpg" />点处的切线方程为_______________。

正确答案:————
26.[主观题]函数 <img width="314" height="88" alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/f4b7be1e-58b3-47d4-a997-d0b5cef7b829/20140707220707.jpg" /> 的驻点是________________。

正确答案:————
27.[主观题]设<img height="93" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/1c454a17-7f36-425a-92c1-771e43b8fcea/20140707204407.jpg" width="208" border="0" alt="" />，求<img height="115" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/1c454a17-7f36-425a-92c1-771e43b8fcea/20140707204413.jpg" width="104" border="0" alt="" /> 。

正确答案:————
28.[主观题]交错的p级数<img height="108" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/d68c8d78-3076-487a-88c8-711eea2a6187/20140706212117.jpg" width="223" border="0" alt="" /> 是否收敛，是绝对收敛还是条件收敛。

正确答案:————
29.[主观题]证明：若数列<img height="93" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/fe5ba76c-ca3b-48dc-91f7-8ce993315d27/20140706145529.jpg" width="105" border="0" alt="" />收敛于a,则级数<img height="98" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/fe5ba76c-ca3b-48dc-91f7-8ce993315d27/20140706145539.jpg" width="323" border="0" alt="" /> 。

正确答案:————
《高等数学（II-2）》第2次
1.[单选题]曲线 <img src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/0505b7cf-a9d3-46b8-8741-4de18f5f6b97/20140707212652.jpg" alt="" width="295" height="43" />在t=2处的切向量是（）。
A.(2,1, 4)
B.(4,3, 4)
C.0
D.(?4,3, 4)
正确答案:——A——
2.[单选题]平面4y－7z=0的位置特点是（）
A.平行于z轴
B.垂直于x轴
C.平行于y轴
D.通过x轴
正确答案:——D——
3.[单选题]以下各方程以<img height="87" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/38afd449-39b7-4b28-924f-cc7704dfaf39/20140706110340.jpg" width="162" border="0" alt="" />为解的是（）。
A.<IMG height=88 alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/38afd449-39b7-4b28-924f-cc7704dfaf39/20140706110401.jpg" width=161 border=0>
B.<IMG height=96 alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/38afd449-39b7-4b28-924f-cc7704dfaf39/20140706110415.jpg" width=160 border=0>
C.<IMG height=87 alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/38afd449-39b7-4b28-924f-cc7704dfaf39/20140706110425.jpg" width=164 border=0>
D.<IMG height=87 alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/38afd449-39b7-4b28-924f-cc7704dfaf39/20140706110435.jpg" width=174 border=0>
正确答案:——A——
4.[单选题]<img width="128" height="79" alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/3a1fc116-0798-4be8-a931-3d7ecd96c1b9/20140710132452.jpg" /> ，且<img width="187" height="98" alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/3a1fc116-0798-4be8-a931-3d7ecd96c1b9/20140710132500.jpg" />收敛，则 <img width="302" height="102" alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/3a1fc116-0798-4be8-a931-3d7ecd96c1b9/20140710132513.jpg" /> ( )。
A.绝对收敛
B.条件收敛
C.收敛
D.发散
正确答案:————
5.[单选题]设<img width="358" height="61" alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/4f2067aa-a210-46da-83ee-95d21c2ad1bb/20140710155859.jpg" />的三个线性无关的解<img width="193" height="80" alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/4f2067aa-a210-46da-83ee-95d21c2ad1bb/20140710155911.jpg" /> ，则该方程的通解为（）。
A.<img width="268" height="48" alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/4f2067aa-a210-46da-83ee-95d21c2ad1bb/20140710155922.jpg" />
B.<img width="388" height="76" alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/4f2067aa-a210-46da-83ee-95d21c2ad1bb/20140710155932.jpg" />
C.<img width="443" height="69" alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/4f2067aa-a210-46da-83ee-95d21c2ad1bb/20140710155941.jpg" />
D.<img width="436" height="81" alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/4f2067aa-a210-46da-83ee-95d21c2ad1bb/20140710155949.jpg" />
正确答案:————
6.[单选题]设<img width="286" height="108" alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/513e0bea-7ba4-460d-9dee-e930d43f99d9/20140709155725.jpg" /> ，当a=（）时<img width="404" height="105" alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/513e0bea-7ba4-460d-9dee-e930d43f99d9/20140709155737.jpg" /> 。
A.1 无忧答案网微信 761296021
B.<img width="93" height="101" alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/513e0bea-7ba4-460d-9dee-e930d43f99d9/20140709155756.jpg" />
C.<img width="103" height="118" alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/513e0bea-7ba4-460d-9dee-e930d43f99d9/20140709155804.jpg" />
D.<img width="108" height="115" alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/513e0bea-7ba4-460d-9dee-e930d43f99d9/20140709155813.jpg" />
正确答案:————
7.[单选题]微分方程<img src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/700f1782-936a-45d3-9148-98d64765387a/20140706121826.jpg" alt="" width="129" height="87" />的通解是（）。
A.<img alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/700f1782-936a-45d3-9148-98d64765387a/20140706121838.jpg" width="219" height="89" />
B.<img alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/700f1782-936a-45d3-9148-98d64765387a/20140706121848.jpg" width="202" height="91" />
C.<img alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/700f1782-936a-45d3-9148-98d64765387a/20140706121902.jpg" width="199" height="79" />
D.<img alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/700f1782-936a-45d3-9148-98d64765387a/20140706121912.jpg" width="153" height="94" />
正确答案:————
8.[单选题]<img src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/7772448a-e838-4690-bf3a-1671a50f84bf/20140709165757.jpg" alt="" width="306" height="97" />与 <img src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/7772448a-e838-4690-bf3a-1671a50f84bf/20140709165806.jpg" alt="" width="323" height="96" />的大小关系为（），其中V是以点（1,1,1），（2,1,1），（1,2,1）和（1,1,2）为顶点的闭区域。
A.大于
B.小于
C.等于
D.不能确定
正确答案:————
9.[单选题]设<img alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/874f301c-bce4-4aa1-86c7-648def600fb1/20140710140143.jpg" width="644" height="69" />，则k =（）。
A.0
B.1
C.-1
D.2
正确答案:————
10.[单选题]下列一阶微分方程中哪个不是可分离变量的微分方程（）。
A.<IMG height=91 alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/8f98e45d-c665-4443-b20c-9583345cc465/20140706112643.jpg" width=288 border=0>
B.<IMG height=81 alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/8f98e45d-c665-4443-b20c-9583345cc465/20140706112653.jpg" width=258 border=0>
C.<IMG height=90 alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/8f98e45d-c665-4443-b20c-9583345cc465/20140706112701.jpg" width=156 border=0>
D.<IMG height=95 alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/8f98e45d-c665-4443-b20c-9583345cc465/20140706112709.jpg" width=435 border=0>
正确答案:————
11.[单选题]下列方程表示抛物面的是（）。
A.<IMG height=70 alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/b045c2b5-ac91-4d53-b468-ba7375693be7/20140707184053.jpg" width=220 border=0>
B.<IMG height=61 alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/b045c2b5-ac91-4d53-b468-ba7375693be7/20140707184103.jpg" width=166 border=0>
C.<IMG height=75 alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/b045c2b5-ac91-4d53-b468-ba7375693be7/20140707184110.jpg" width=198 border=0>
D.<IMG height=57 alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/b045c2b5-ac91-4d53-b468-ba7375693be7/20140707184117.jpg" width=237 border=0>
正确答案:————
12.[单选题]下列平面中，垂直于Z轴的是（）。
A.x＋y＋z = 0
B.z = 4
C.5x－6y = 1
D.y－z = 1
正确答案:————
13.[单选题]下列方程中表示双叶双曲面的是（）。
A.<IMG height=101 alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/c0959186-30ec-498c-905e-8d4f81b47a31/20140707183436.jpg" width=241 border=0>
B.<IMG height=70 alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/c0959186-30ec-498c-905e-8d4f81b47a31/20140707183446.jpg" width=233 border=0>
C.<IMG height=83 alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/c0959186-30ec-498c-905e-8d4f81b47a31/20140707183455.jpg" width=267 border=0>
D.<IMG height=88 alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/c0959186-30ec-498c-905e-8d4f81b47a31/20140707183505.jpg" width=240 border=0>
正确答案:————
14.[单选题]求解微分方程 <img src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/cac29977-8b98-4f96-9a84-d4cc7a5c8abf/20140706123629.jpg" alt="" width="293" height="88" />使用变换 <img src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/cac29977-8b98-4f96-9a84-d4cc7a5c8abf/20140706123644.jpg" alt="" width="114" height="73" />降阶得到的方程是（）。
A.<img alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/cac29977-8b98-4f96-9a84-d4cc7a5c8abf/20140706124005.jpg" width="276" height="98" />
B.<img alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/cac29977-8b98-4f96-9a84-d4cc7a5c8abf/20140706123733.jpg" width="262" height="106" />
C.<img alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/cac29977-8b98-4f96-9a84-d4cc7a5c8abf/20140706123745.jpg" width="270" height="94" />
D.<img alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/cac29977-8b98-4f96-9a84-d4cc7a5c8abf/20140706123757.jpg" width="267" height="117" />
正确答案:————
15.[单选题]级数<img src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/cb40034d-cdde-4b06-a7ab-26a27dd4d2b7/20140706144935.jpg" alt="" width="468" height="108" />的和为（）
A.1
B.<img src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/cb40034d-cdde-4b06-a7ab-26a27dd4d2b7/20190225144422311001.png" width="10" height="38" /> 
C.<img src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/cb40034d-cdde-4b06-a7ab-26a27dd4d2b7/20190225144648944001.png" width="10" height="38" />
D.2
正确答案:————
16.[判断题]将yoz坐标面上的直线<img border="0" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/a1da0bc3-802b-4da7-adfd-1d86f9078d0f/20140707145455.jpg" width="228" height="94" alt="" />绕z轴旋转一周，所得的旋转曲面方程<img border="0" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/a1da0bc3-802b-4da7-adfd-1d86f9078d0f/20140707145507.jpg" width="279" height="114" alt="" />。（）
A.正确
B.错误
正确答案:————
17.[判断题]无穷级数<img height="78" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/b7af9727-bcee-4120-9313-1b6a99b52dab/20140706145836.jpg" width="240" border="0" alt="" /> 收敛。（）
A.正确
B.错误
正确答案:————
18.[判断题]y=<img width="262" height="81" alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/c4db97c7-12bd-4ad9-8713-0e3cc5fb65a5/20140706125341.jpg" />是微分方程 <img width="232" height="81" alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/c4db97c7-12bd-4ad9-8713-0e3cc5fb65a5/20140706125350.jpg" />的通解。（）
A.正确
B.错误
正确答案:————
19.[判断题]曲面 <img height="89" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/d769b19f-15f9-4a06-ac18-df62f896dc28/20140707213615.jpg" width="185" border="0" alt="" />在点(1,2,3)处的法线方程为<img height="105" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/d769b19f-15f9-4a06-ac18-df62f896dc28/20140707213622.jpg" width="246" border="0" alt="" /> 。( )
A.正确
B.错误
正确答案:————
20.[判断题]对于非齐次微分方程<img height="103" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/d872b9c2-9ee9-4dd9-8489-66890e5c6560/20140706104422.jpg" width="297" border="0" alt="" /> 的通解的Matlab命令为y=dsolve ('D2y-2Dy=(x^2+2x)exp(x)','x')。（）
A.正确
B.错误
正确答案:————
21.[主观题]二阶齐次微分方程<img width="308" height="80" alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/1d92b100-bec5-404f-aaa3-e2c89fc079f4/20140710160940.jpg" /> 的通解为___________。

正确答案:————
22.[主观题]<img width="113" height="69" alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/2bf7afb9-9209-4936-b4ce-7b5425931a98/20140707210504.jpg" />， <img width="78" height="79" alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/2bf7afb9-9209-4936-b4ce-7b5425931a98/20140707210514.jpg" /> =____________。

正确答案:————
23.[主观题]函数<img height="68" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/4800dce1-a863-499a-9aee-70f07d1fcc5f/20140707185736.jpg" width="199" border="0" alt="" />的全微分为 dz= ______ 。

正确答案:————
24.[主观题]过点(1,-3,2)且平行于两平面<img width="311" height="84" alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/662f97fa-7177-4156-a43d-9272fda3b7a4/20140707163919.jpg" /> 及 <img width="317" height="82" alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/662f97fa-7177-4156-a43d-9272fda3b7a4/20140707163931.jpg" /> 的直线方程为_____________________________。

正确答案:————
25.[主观题]幂级数 <img width="261" height="104" alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/87a08048-93f0-424a-b7c5-bbc44a9a2a44/20140706214322.jpg" /> 的收敛区域为__________________。

正确答案:————
26.[主观题]求曲线<img width="353" height="73" alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/978bad64-70bb-4c57-8b9b-90034bec234a/20140710142823.jpg" /> 在对应于 <img width="115" height="86" alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/978bad64-70bb-4c57-8b9b-90034bec234a/20140710142833.jpg" />点处的切线方程为_______________。

正确答案:————
27.[主观题]设有两点<img height="68" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/7747c71f-acac-41a1-a3b5-b8105b3bfb92/20140706222522.jpg" width="134" border="0" alt="" />和<img height="81" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/7747c71f-acac-41a1-a3b5-b8105b3bfb92/20140706222535.jpg" width="149" border="0" alt="" />，在Z轴上求 <img height="69" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/7747c71f-acac-41a1-a3b5-b8105b3bfb92/20140706222549.jpg" width="79" border="0" alt="" /> 和 <img height="68" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/7747c71f-acac-41a1-a3b5-b8105b3bfb92/20140706222559.jpg" width="51" border="0" alt="" /> 距离相等的点。

正确答案:————
28.[主观题]验证函数<img height="77" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/7bf609cd-6fc6-467a-b22c-95214343ffa6/20140706110856.jpg" width="148" border="0" alt="" />是微分方程<img height="92" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/7bf609cd-6fc6-467a-b22c-95214343ffa6/20140706110907.jpg" width="414" border="0" alt="" /> 的解。

正确答案:————
29.[主观题]设级数 <img height="80" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/6052cae6-535e-47e4-a302-06bb24737f05/20140706151645.jpg" width="151" border="0" alt="" /> 收敛, 证明级数<img height="100" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/6052cae6-535e-47e4-a302-06bb24737f05/20140706151654.jpg" width="242" border="0" alt="" /> 收敛。

正确答案:————
《高等数学（II-2）》第3次
1.[单选题]下列级数中,收敛级数是()
A.<IMG height=118 alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/1bbd8053-7d36-4cee-bffc-2433880a30a2/20140706150205.jpg" width=162 border=0>
B.<IMG height=110 alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/1bbd8053-7d36-4cee-bffc-2433880a30a2/20140706150214.jpg" width=178 border=0>
C.<IMG height=125 alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/1bbd8053-7d36-4cee-bffc-2433880a30a2/20140706150232.jpg" width=174 border=0>
D.<IMG height=115 alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/1bbd8053-7d36-4cee-bffc-2433880a30a2/20140706150239.jpg" width=174 border=0>
正确答案:——A——
2.[单选题]按牛顿冷却定律：物体在空气中冷却的速度与物体的温度和空气的温度之差成正比。已知空气温度为300C,而物体在15分钟内从1000C冷却到700C，求物体冷却到400C所需的时间为（）分钟。
A.50
B.51
C.52
D.53
正确答案:——C——
3.[单选题]二元函数<img height="98" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/45ea71a3-c2cb-4df9-8a85-ef187522809a/20140707203829.jpg" width="344" border="0" alt="" />的定义域是( )。
A.<IMG height=63 alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/45ea71a3-c2cb-4df9-8a85-ef187522809a/20140707203925.jpg" width=163 border=0>
B.<IMG height=72 alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/45ea71a3-c2cb-4df9-8a85-ef187522809a/20140707203953.jpg" width=151 border=0>
C.<IMG height=59 alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/45ea71a3-c2cb-4df9-8a85-ef187522809a/20140707204000.jpg" width=143 border=0>
D.<IMG height=69 alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/45ea71a3-c2cb-4df9-8a85-ef187522809a/20140707204006.jpg" width=162 border=0>
正确答案:——A——
4.[单选题]<img border="0" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/51dcceaa-e035-4a3f-b2c4-c2927d997098/20140710113325.jpg" width="319" height="93" alt="" />（），其中L为直线y = x上从点(0,0)到(1,1)的那一段。
A.<IMG border=0 alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/51dcceaa-e035-4a3f-b2c4-c2927d997098/20140710113339.jpg" width=51 height=84>
B.<IMG border=0 alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/51dcceaa-e035-4a3f-b2c4-c2927d997098/20140710113347.jpg" width=101 height=95>
C.<IMG border=0 alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/51dcceaa-e035-4a3f-b2c4-c2927d997098/20140710113355.jpg" width=89 height=98>
D.<IMG border=0 alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/51dcceaa-e035-4a3f-b2c4-c2927d997098/20140710113406.jpg" width=95 height=96>
正确答案:————
5.[单选题]设<img width="193" height="73" alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/52a48a48-66bf-400d-bf57-7cf977bf343b/20140707211349.jpg" /> ，则以下结果正确的是（）。
A.<img width="188" height="93" alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/52a48a48-66bf-400d-bf57-7cf977bf343b/20140707211401.jpg" />
B.<img width="183" height="89" alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/52a48a48-66bf-400d-bf57-7cf977bf343b/20140707211408.jpg" />
C.<img width="188" height="90" alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/52a48a48-66bf-400d-bf57-7cf977bf343b/20140707211417.jpg" />
D.<img width="199" height="96" alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/52a48a48-66bf-400d-bf57-7cf977bf343b/20140707211423.jpg" />
正确答案:————
6.[单选题]设a= (2,－3,1),b= (1,－1,3),c = (1,－2,0)，则（a+b）×(b +c)等于( )。
A.（0,1，－1）
B.（0,－1，－1）
C.（0,1，1）
D.（0,－1， 1）
正确答案:————
7.[单选题]交错级数<img height="94" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/6ba3af36-ca48-4c8c-a71b-d7a64c3cdeb2/20140706210207.jpg" width="266" border="0" alt="" />（）
A.一定发散
B.一定条件收敛
C.可收敛也可发散
D.一定绝对收敛
正确答案:————
8.[单选题]<img border="0" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/71fa95fb-4777-4ba4-8941-2cf171471aa7/20140710155441.jpg" width="156" height="76" alt="" /> 是微分方程 <img border="0" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/71fa95fb-4777-4ba4-8941-2cf171471aa7/20140710155455.jpg" width="234" height="83" alt="" /> 的解，并且<img border="0" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/71fa95fb-4777-4ba4-8941-2cf171471aa7/20140710155508.jpg" width="178" height="104" alt="" />，则<img border="0" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/71fa95fb-4777-4ba4-8941-2cf171471aa7/20140710155524.jpg" width="120" height="79" alt="" />（）。
A.<IMG border=0 alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/71fa95fb-4777-4ba4-8941-2cf171471aa7/20140710155557.jpg" width=72 height=78>
B.<IMG border=0 alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/71fa95fb-4777-4ba4-8941-2cf171471aa7/20140710155607.jpg" width=80 height=86>
C.<IMG border=0 alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/71fa95fb-4777-4ba4-8941-2cf171471aa7/20140710155619.jpg" width=113 height=99>
D.<IMG border=0 alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/71fa95fb-4777-4ba4-8941-2cf171471aa7/20140710155637.jpg" width=126 height=87>
正确答案:————
9.[单选题]求解微分方程<img height="91" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/86170006-51f0-42ed-a300-6285c2e8cde0/20140706104101.jpg" width="292" border="0" alt="" />满足初始条件<img height="76" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/86170006-51f0-42ed-a300-6285c2e8cde0/20140706104116.jpg" width="152" border="0" alt="" />的特解的Matlab命令为( )。
A.y=dsolve ('Dy=(1+x)(1+siny)',’y(0)=2’,'x')
B.y=dsolve ('Dy=(1+x)*(1+sin(y))',’y(0)=2’,'x')
C.y=dsolve ('Dy=(1+x)(1+sin(y))',’y(0)=2’,'x')
D.y=dsolve ('Dy=(1+x)*(1+siny)',’y(0)=2’,'x')
正确答案:————
10.[单选题]交换二次积分 <img width="265" height="82" alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/95f56f48-b6c3-41a5-85c1-248b07104135/20140707224731.jpg" /> 的积分次序可得( ) 。
A.<img width="254" height="76" alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/95f56f48-b6c3-41a5-85c1-248b07104135/20140707224739.jpg" />
B.<img width="278" height="69" alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/95f56f48-b6c3-41a5-85c1-248b07104135/20140707224747.jpg" />
C.<img width="280" height="71" alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/95f56f48-b6c3-41a5-85c1-248b07104135/20140707224754.jpg" />
D.<img width="260" height="84" alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/95f56f48-b6c3-41a5-85c1-248b07104135/20140707224800.jpg" />
正确答案:————
11.[单选题]对于非齐次微分方程<img height="83" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/968eaddb-6771-4704-bda6-0f1a07f5d6ba/20140706132425.jpg" width="301" border="0" alt="" />，其特解有（）的形式。
A.<IMG height=86 alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/968eaddb-6771-4704-bda6-0f1a07f5d6ba/20140706132437.jpg" width=283 border=0>
B.<IMG height=75 alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/968eaddb-6771-4704-bda6-0f1a07f5d6ba/20140706132444.jpg" width=257 border=0>
C.<IMG height=65 alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/968eaddb-6771-4704-bda6-0f1a07f5d6ba/20140706132452.jpg" width=346 border=0>
D.<IMG height=80 alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/968eaddb-6771-4704-bda6-0f1a07f5d6ba/20140706132459.jpg" width=196 border=0>
正确答案:————
12.[单选题]设<img height="75" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/9e365902-57e0-4b86-bcca-65b8226e6486/20140707205806.jpg" width="256" border="0" alt="" /> ，则 <img height="92" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/9e365902-57e0-4b86-bcca-65b8226e6486/20140707205815.jpg" width="49" border="0" alt="" />=（）。
A.<IMG height=88 alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/9e365902-57e0-4b86-bcca-65b8226e6486/20140707205822.jpg" width=164 border=0>
B.<IMG height=95 alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/9e365902-57e0-4b86-bcca-65b8226e6486/20140707205832.jpg" width=139 border=0>
C.<IMG height=100 alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/9e365902-57e0-4b86-bcca-65b8226e6486/20140707205839.jpg" width=145 border=0>
D.<IMG height=109 alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/9e365902-57e0-4b86-bcca-65b8226e6486/20140707205845.jpg" width=147 border=0>
正确答案:————
13.[单选题]二平面<img width="239" height="67" alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/a23e3e03-7483-42b4-9529-66f98db81d79/20140707162530.jpg" /> ，<img width="194" height="92" alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/a23e3e03-7483-42b4-9529-66f98db81d79/20140707162540.jpg" />的夹角 <img width="56" height="73" alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/a23e3e03-7483-42b4-9529-66f98db81d79/20140707162550.jpg" />=( )。
A.<img width="92" height="58" alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/a23e3e03-7483-42b4-9529-66f98db81d79/20140707162603.jpg" />
B.<img width="79" height="50" alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/a23e3e03-7483-42b4-9529-66f98db81d79/20140707162612.jpg" />
C.<img width="73" height="65" alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/a23e3e03-7483-42b4-9529-66f98db81d79/20140707162622.jpg" />
D.0
正确答案:————
14.[单选题]直线<img border="0" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/a4342b0b-ed22-4be7-a3cd-625921c9d9b8/20140707170156.jpg" width="256" height="94" alt="" />与直线<img border="0" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/a4342b0b-ed22-4be7-a3cd-625921c9d9b8/20140707170208.jpg" width="216" height="102" alt="" />的夹角为（）
A.0°
B.45°
C.60°
D.90°
正确答案:————
15.[单选题]设函数<img width="279" height="82" alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/c5857da5-1250-45be-8446-4f47a7f0f4b5/20140707184834.jpg" />，其中a＞0为常数，则f(x,y)在(0,0)点（）。
A.连续，但不可偏导
B.可偏导，但不连续
C.可微且df|(0,0)=0
D.fx(x,y)和fy(x,y)在（0，0）点连续
正确答案:————
16.[判断题]已知函数<img border="0" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/32d9403a-a576-488f-b27f-a49f58cc1480/20140709110246.jpg" width="303" height="106" alt="" /> ，则<img border="0" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/32d9403a-a576-488f-b27f-a49f58cc1480/20140709110257.jpg" width="225" height="121" alt="" />。（）
A.正确
B.错误
正确答案:————
17.[判断题]无穷级数<img height="81" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/719478ef-19a0-4232-89a9-2866b7f151fc/20140706205033.jpg" width="188" border="0" alt="" />收敛。（）
A.正确
B.错误
正确答案:————
18.[判断题]微分方程<img height="74" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/9e2954ea-85a4-4190-ae29-cca354a626e8/20140706113040.jpg" width="511" border="0" alt="" />的通解为<img height="69" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/9e2954ea-85a4-4190-ae29-cca354a626e8/20140706113049.jpg" width="151" border="0" alt="" />。（）
A.正确
B.错误
正确答案:————
19.[判断题]级数<img height="100" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/d4c5215b-a318-4498-9b66-927150b9e9f7/20140706144309.jpg" width="209" border="0" alt="" />收敛。（）
A.正确
B.错误
正确答案:————
20.[判断题]曲面 <img height="89" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/d769b19f-15f9-4a06-ac18-df62f896dc28/20140707213615.jpg" width="185" border="0" alt="" />在点(1,2,3)处的法线方程为<img height="105" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/d769b19f-15f9-4a06-ac18-df62f896dc28/20140707213622.jpg" width="246" border="0" alt="" /> 。( )
A.正确
B.错误
正确答案:————
21.[主观题]设<img width="118" height="75" alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/2bbc994b-b333-446e-87bd-b51835d7d6e0/20140707211857.jpg" /> ，则 <img width="102" height="83" alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/2bbc994b-b333-446e-87bd-b51835d7d6e0/20140707211905.jpg" />__________________。

正确答案:————
22.[主观题]通过点<img width="208" height="96" alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/582eb691-61ab-49e7-a1e4-16a14699d880/20140707163603.jpg" /> 与<img width="187" height="87" alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/582eb691-61ab-49e7-a1e4-16a14699d880/20140707163614.jpg" /> 的直线方程为______________。

正确答案:————
23.[主观题]幂级数<img width="234" height="89" alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/892e803d-db8d-4d67-9e94-72755b76946f/20140710135309.jpg" /> 的收敛域为__________，其和函数为_________________。

正确答案:————
24.[主观题]微分方程<img width="317" height="98" alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/c0268a51-c23e-4aa5-96a8-b6b78675a8e8/20140706115548.jpg" />的通解为__________________。

正确答案:————
25.[主观题]<img width="351" height="69" alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/db19bd21-d8f9-432a-a5dc-c5161e3e99c7/20140710142926.jpg" /> ，则该函数的驻点为____________________。

正确答案:————
26.[主观题]过点<img width="194" height="78" alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/e975067d-6deb-49d4-b21d-d919c8f5ba26/20140707151931.jpg" /> 且垂直于向量<img width="108" height="84" alt="" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/e975067d-6deb-49d4-b21d-d919c8f5ba26/20140707151945.jpg" />的平面方程为___________。

正确答案:————
27.[主观题]求球面 <img height="72" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/34bc3492-5944-40cd-bee5-b32fdb60ae52/20140707213911.jpg" width="234" border="0" alt="" />上平行于平面 <img height="71" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/34bc3492-5944-40cd-bee5-b32fdb60ae52/20140707213918.jpg" width="144" border="0" alt="" />的切面方程。

正确答案:————
28.[主观题]在<img height="48" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/6cf0fbb3-0e7e-43bd-8567-131a008c5148/20140707221613.jpg" width="84" border="0" alt="" />坐标面上找一点P使它到三点<img height="81" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/6cf0fbb3-0e7e-43bd-8567-131a008c5148/20140707221621.jpg" width="282" border="0" alt="" />的距离平方和最小。

正确答案:————
29.[主观题]设正项级数<img height="83" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/a3bc96bf-7352-4e07-a325-303300690479/20140706151915.jpg" width="140" border="0" alt="" />收敛,证明级数<img height="89" src="http://file.5any.com/UniversityV4.0/CourseProblem/c010b0bc/a3bc96bf-7352-4e07-a325-303300690479/20140706151923.jpg" width="153" border="0" alt="" /> 收敛；反之是否成立。

正确答案:————
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重庆大学19秋《高等数学（II-2）》在线作业