俗亩核悍必被苯敢狮马们棵途
Chapter1SystemsofLinearEquations
unittest1
1、单选题:
A:
B:
C:
D:
答案:
2、单选题:
In the following matrices, ( ) is not elementary matrix.
A:
B:
C:
D:
答案:
3、单选题:
A:
the elementary row operation of interchanging
the first and second rows.
B:
the elementary row operation of interchanging
the second and third rows.
C:
the elementary column operation of interchanging the first and second columns.
D:
the elementary column operation of interchanging the second and third columns.
答案:
the elementary row operation of interchanging
the second and third rows.
4、判断题:
If is nonsingular, then can be factored into a
product of elementary matrices.
A: 正确
B: 错误
答案: 正确
5、判断题:
If A is a 3×3 matrix and a1 +2a2 −a3 = 0, then A must be singular.
A: 正确
B: 错误
答案: 正确
6、判断题:
If A and B are n×n matrices, then (A-B)2 = A2 −2AB+B2.
A: 正确
B: 错误
答案: 正确
7、填空题:
Use back substitution to solve the following systems
of equations:
答案: x1 = 4
x2 = 1
x3 = 3
8、填空题:
答案: – 2/3
9、填空题:
答案: 5 -10 15
5 -1 4
8 -9 6
10、填空题:
答案: 1 2 -3
-1 1 -1
0 -2 3
Chapter2Determinants
unittest2
1、单选题:
A: 1
B: 6
C: -6
D: 0
答案: -6
2、单选题:
Let A be a n×n matrix, then ( )
A:
AAT =ATA.
B:
det(AAT ) = det(AT A).
C:
if det(A) = 0, then A is invertible.
D:
if det(A) = 0, then AT is invertible.
答案:
det(AAT ) = det(AT A).
3、单选题:
A:
上方为免费预览版答案,如需购买完整答案,请点击下方红字:
为了方便下次阅读,建议在浏览器添加书签收藏本网页
添加书签方法:
1.电脑按键盘的Ctrl键+D键即可收藏本网页
2.手机浏览器可以添加书签收藏本网页
点击浏览器底部菜单-【添加书签】-收藏本网页
点击浏览器底部菜单-【书签/历史】-可查看本网页
获取更多慕课答案,欢迎在浏览器访问我们的网站:
http://mooc.mengmianren.com
注:请切换至英文输入法输入域名,如果没有成功进入网站,请输入完整域名:http://mooc.mengmianren.com/
我们的公众号
打开手机微信,扫一扫下方二维码,关注微信公众号:萌面人APP
本公众号可查看各种网课答案,还可免费查看大学教材答案
点击这里,可查看公众号功能介绍
APP下载
APP功能说明
1.可查看各种网课答案
点击【萌面人官网】,可查看知到智慧树,超星尔雅学习通,学堂在线等网课答案
点击【中国大学慕课答案】,可查看mooc慕课答案
2.可一键领取淘宝/天猫/京东/拼多多无门槛优惠券
如图所示,点击对应图标即可领取淘宝/天猫/京东/拼多多无门槛优惠券
秋守骨曝雌泰入吼拌拜钦羞酸