端木老师 发表于 2021-4-29 17:21:03

兰大《线性代数》21春平时作业1

《线性代数》21春平时作业1
1.[单选题] <img id="ODruxscTEMP20190805121620706.png" src="http://oescdn.open.com.cn/zyglpt/OD/TEMP/2019/0805/ODruxscTEMP20190805121620706.png?Expires=1880295380&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=zBjTLoOyAIRMN5IBSHO5CIgPxjQ%3D" />
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    A.2
    B.-2
    C.4
    D.-4
    答:——B——
2.[单选题] 题面见图9<img height="147" width="666" alt="" src="http://file.open.com.cn/ItemDB/37509/bfa1641c-93d2-4114-856d-7c6c3526d996/2008114121319781.JPG" />
    A.A
    B.B
    C.C
    D.D
    答:——C——
3.[单选题] <img id="ODqqagiTEMP20190805121653106.png" src="http://oescdn.open.com.cn/zyglpt/OD/TEMP/2019/0805/ODqqagiTEMP20190805121653106.png?Expires=1880295413&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=mEvzfpNVcnFvRkf9ixZmtc%2Bk5BI%3D" />
    A.<img id="ODswianTEMP20190805121653224.png" src="http://oescdn.open.com.cn/zyglpt/OD/TEMP/2019/0805/ODswianTEMP20190805121653224.png?Expires=1880295413&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=zRNTOkHUN2JNBBgrn3ZmVVJOy3M%3D" />
    B.<img id="ODikoxyTEMP20190805121653375.png" src="http://oescdn.open.com.cn/zyglpt/OD/TEMP/2019/0805/ODikoxyTEMP20190805121653375.png?Expires=1880295413&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=wGNFnV1jrYjwIYGwteOgNQBzNsU%3D" />
    C.<img id="ODjflntTEMP20190805121653516.png" src="http://oescdn.open.com.cn/zyglpt/OD/TEMP/2019/0805/ODjflntTEMP20190805121653516.png?Expires=1880295413&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=n8vpCTNT17xtJqrTC4of5KurkvY%3D" />
    D.<img id="ODfcxbcTEMP20190805121653654.png" src="http://oescdn.open.com.cn/zyglpt/OD/TEMP/2019/0805/ODfcxbcTEMP20190805121653654.png?Expires=1880295413&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=GrR9U5mw6f86p5BGZiQI%2BS55BwE%3D" />
    答:——C——
4.[单选题] <img id="ODggjnyTEMP20190805121633786.png" src="http://oescdn.open.com.cn/zyglpt/OD/TEMP/2019/0805/ODggjnyTEMP20190805121633786.png?Expires=1880295393&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=r1ixXU61VbaP2XRz1iBMyPow3j0%3D" />
    A.<img id="ODfrnljTEMP20190805121633923.png" src="http://oescdn.open.com.cn/zyglpt/OD/TEMP/2019/0805/ODfrnljTEMP20190805121633923.png?Expires=1880295394&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=udITFp3O7GeZimDdDPcPLtjYIfU%3D" />
    B.<img id="ODvypfxTEMP20190805121634065.png" src="http://oescdn.open.com.cn/zyglpt/OD/TEMP/2019/0805/ODvypfxTEMP20190805121634065.png?Expires=1880295394&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=A6wM87jfZoLDMxthZH1TP61CPHQ%3D" />
    C.<img id="ODlksarTEMP20190805121634223.png" src="http://oescdn.open.com.cn/zyglpt/OD/TEMP/2019/0805/ODlksarTEMP20190805121634223.png?Expires=1880295394&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=AwGWdPBxXQTqh6X1dfJ0t9Hq2lQ%3D" />
    D.<img id="ODjvgpyTEMP20190805121634423.png" src="http://oescdn.open.com.cn/zyglpt/OD/TEMP/2019/0805/ODjvgpyTEMP20190805121634423.png?Expires=1880295394&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=tT8aKnfDoT3IDDzG4BYrqUbJ8/k%3D" />
    答:————
5.[单选题] <img id="ODddndeTEMP20190805121725392.png" src="http://oescdn.open.com.cn/zyglpt/OD/TEMP/2019/0805/ODddndeTEMP20190805121725392.png?Expires=1880295445&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=WVTa%2BlB8CLZflSbQcxnL4kXdxgc%3D" />
    A.<img id="ODdoaokTEMP20190805121725531.png" src="http://oescdn.open.com.cn/zyglpt/OD/TEMP/2019/0805/ODdoaokTEMP20190805121725531.png?Expires=1880295445&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=qoSgC0u9hEbS1UX%2BShIrY34KRVU%3D" />
    B.所有r-1阶子式全为0
    C.至少有一个r阶子式不等于0
    D.所有r阶子式都不为0
    答:————
6.[单选题] <img id="ODqiaxsTEMP20190805121635209.png" src="http://oescdn.open.com.cn/zyglpt/OD/TEMP/2019/0805/ODqiaxsTEMP20190805121635209.png?Expires=1880295395&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=qn%2B2JNmqJ%2BIAKrWnQhZ%2BORfxaDw%3D" />
    A.A与B相似
    B.A与B不等价
    C.A与B有相同的特征值
    D.A与B合同
    答:————
7.[单选题] 题面见图17<img height="95" width="621" alt="" src="http://file.open.com.cn/ItemDB/37509/a201668a-6bac-4f33-9d1d-eef9a80a9c52/200811412958829.jpg" />
    A.A
    B.B
    C.C
    D.D
    答:————
8.[单选题] 设n阶方阵A不可逆，则必有（ ）
    A.<img id="ODttgevTEMP20190805121636397.png" src="http://oescdn.open.com.cn/zyglpt/OD/TEMP/2019/0805/ODttgevTEMP20190805121636397.png?Expires=1880295396&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=X5w6EJO74f0g0%2BIvIX35DHOj3Iw%3D" />
    B.<img id="ODwjyhrTEMP20190805121636533.png" src="http://oescdn.open.com.cn/zyglpt/OD/TEMP/2019/0805/ODwjyhrTEMP20190805121636533.png?Expires=1880295396&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=MU82a5mDaxr6rcIuGwcfSiMSVo8%3D" />
    C.<img id="ODoeigpTEMP20190805121636683.png" src="http://oescdn.open.com.cn/zyglpt/OD/TEMP/2019/0805/ODoeigpTEMP20190805121636683.png?Expires=1880295396&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=3UeXcb7e95xUl1z1B8z4QcWIFIw%3D" />
    D.方程组Ax=0只有零解
    答:————
9.[单选题] <img id="ODsdmqgTEMP20190805121707812.png" src="http://oescdn.open.com.cn/zyglpt/OD/TEMP/2019/0805/ODsdmqgTEMP20190805121707812.png?Expires=1880295427&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=fSFoZ2SVlTHZ0RiqvWqMABy4Euk%3D" />
    A.A．充分条件
    B.B．必要条件
    C.C． 充要条件
    D.D． 无关条件
    答:————
10.[单选题] 设3阶实对称矩阵A的特征值分别为2，1，0，则（ ）
    A.正定
    B.半正定
    C.负定
    D.半负定
    答:————
11.[单选题] <img id="ODhkrytTEMP20190805121614749.png" src="http://oescdn.open.com.cn/zyglpt/OD/TEMP/2019/0805/ODhkrytTEMP20190805121614749.png?Expires=1880295374&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=yoGUKBiAD06QJaaII8LpH96NQb0%3D" />
    A.（A）    更多答案进 ap5u.com 南开 q76129 6021
    B.（B）
    C.（C）
    D.（D）
    答:————
12.[单选题] <img id="ODdsgpiTEMP20190805121712181.png" src="http://oescdn.open.com.cn/zyglpt/OD/TEMP/2019/0805/ODdsgpiTEMP20190805121712181.png?Expires=1880295432&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=APdnA0vpswU8pvcOaupGnj3d9Ps%3D" />
    A.<img id="ODwdpqpTEMP20190805121712322.png" src="http://oescdn.open.com.cn/zyglpt/OD/TEMP/2019/0805/ODwdpqpTEMP20190805121712322.png?Expires=1880295432&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=vRXUzH7IsglEuv2A1omn/YblDjg%3D" />
    B.<img id="ODdyuclTEMP20190805121712455.png" src="http://oescdn.open.com.cn/zyglpt/OD/TEMP/2019/0805/ODdyuclTEMP20190805121712455.png?Expires=1880295432&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=LnadeEferk9ZfYpX485rNRgY2pI%3D" />
    C.<img id="ODiacdrTEMP20190805121712609.png" src="http://oescdn.open.com.cn/zyglpt/OD/TEMP/2019/0805/ODiacdrTEMP20190805121712609.png?Expires=1880295432&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=vVIllGNTVktscBHGmLk6d1spRPc%3D" />
    D.<img id="ODoykqdTEMP20190805121712732.png" src="http://oescdn.open.com.cn/zyglpt/OD/TEMP/2019/0805/ODoykqdTEMP20190805121712732.png?Expires=1880295432&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=xBQ41wl%2BNi%2BunQv9khTe3gHgKXA%3D" />
    答:————
13.[单选题] <img id="ODatitwTEMP20190805121615753.png" src="http://oescdn.open.com.cn/zyglpt/OD/TEMP/2019/0805/ODatitwTEMP20190805121615753.png?Expires=1880295375&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=5fS9vGmdEvyemTGgynK3EOGGqfQ%3D" />
    A.（A）
    B.（B）
    C.（C）
    D.（D）
    答:————
14.[单选题] <img id="ODprfoaTEMP20190805121556798.png" src="http://oescdn.open.com.cn/zyglpt/OD/TEMP/2019/0805/ODprfoaTEMP20190805121556798.png?Expires=1880295356&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=kzOTAH9GZTecyEoO3Edq1kyUXKc%3D" />
    A.7
    B.6
    C.5
    D.4
    答:————
15.[单选题] 题面见图21<img height="137" width="351" alt="" src="http://file.open.com.cn/ItemDB/37509/b842cc16-5b53-4a77-9401-a8816a59a646/2008114122034356.jpg" />
    A.A
    B.B
    C.C
    D.D
    答:————
16.[单选题] 题面见图12<img height="148" width="463" alt="" src="http://file.open.com.cn/ItemDB/37509/726a2380-7f7f-4e61-a1a2-a2b15d9479e3/20081141252110.jpg" />
    A.A
    B.B
    C.C
    D.D
    答:————
17.[判断题] 题面见图1-7<img height="38" width="575" alt="" src="http://file.open.com.cn/ItemDB/37509/9ded1a67-1ac4-439e-a7ab-9eb3ae096914/2008114124452316.jpg" />
    A.错误
    B.正确
    答:————
18.[判断题] 题面见图1-5<img height="41" width="399" alt="" src="http://file.open.com.cn/ItemDB/37509/ccabb5b0-7c3a-4c6b-9ab2-be3e4b5a4f76/2008114121726295.JPG" />
    A.错误
    B.正确
    答:————
19.[判断题] 题面见图1-2<img height="36" width="629" alt="" src="http://file.open.com.cn/ItemDB/37509/04ebbdff-73c3-45e0-bdab-73b71adc04b6/2008114121821966.JPG" />
    A.错误
    B.正确
    答:————
20.[判断题] 题面见图1-5<img height="39" width="702" alt="" src="http://file.open.com.cn/ItemDB/37509/6230c445-b2f8-40f6-900a-f00b9ff3b48f/2008114124533503.jpg" />
    A.错误
    B.正确
    答:————
21.[判断题] 题面见图1-9<img height="93" width="747" alt="" src="http://file.open.com.cn/ItemDB/37509/1cd1f5a7-1428-4bdf-9fcc-3c46b1359471/2008114124359800.jpg" />
    A.错误
    B.正确
    答:————
22.[判断题] 题面见图1-3<img height="75" width="738" alt="" src="http://file.open.com.cn/ItemDB/37509/75a09c1a-1083-494e-8bd0-157732cfd1cc/200811412462765.jpg" />
    A.错误
    B.正确
    答:————
23.[判断题] 题面见图1-6<img height="30" width="735" alt="" src="http://file.open.com.cn/ItemDB/37509/9bb7b88f-0694-4130-9779-e18d18a2844d/2008114124513237.jpg" />
    A.错误
    B.正确
    答:————
24.[判断题] 题面见图1-1<img height="46" width="531" alt="" src="http://file.open.com.cn/ItemDB/37509/79a440f1-39d4-4a83-8814-53c4f4bff948/2008114121838513.JPG" />
    A.错误
    B.正确
    答:————
25.[判断题] 题面见图1-1<img height="89" width="730" alt="" src="http://file.open.com.cn/ItemDB/37509/99c6aa00-d9cb-455b-8278-8dfd1f1641d7/200811412476393.jpg" />
    A.错误
    B.正确
    答:————
26.[判断题] 题面见图1-10<img height="91" width="747" alt="" src="http://file.open.com.cn/ItemDB/37509/7a3919c2-cffe-4ae5-9797-df6c0b16e672/2008114124340207.jpg" />
    A.错误
    B.正确
    答:————

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