2021年电大工程数学形成性考核册答案.pdf
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1、word 文档 可自由复制编辑工程数学作业(一)答案(满分 100 分)第 2 章矩阵(一)单项选择题(每小题2 分,共 20 分)设aaabbbccc1231231232,则aaaabababccc123112233123232323(D)A.4 B.4 C.6 D.6 若000100002001001aa,则a(A)A.12B.1 C.12D.1 乘积矩阵1124103521中元素c23(C)A.1 B.7 C.10 D.8 设A B,均为n阶可逆矩阵,则下列运算关系正确的是(B)A.ABAB111B.()ABBA11C.()ABAB111D.()ABAB111设A B,均为n阶方阵,k0
2、且k1,则下列等式正确的是(D)A.ABABB.ABn A BC.kAk AD.kAkAn()下列结论正确的是(A)A.若A是正交矩阵,则A1也是正交矩阵B.若A B,均为n阶对称矩阵,则AB也是对称矩阵C.若A B,均为n阶非零矩阵,则AB也是非零矩阵D.若A B,均为n阶非零矩阵,则AB0矩阵1325的伴随矩阵为(C)A.1325B.1325|精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 1 页,共 18 页word 文档 可自由复制编辑C.5321D.5321方阵A可逆的充分必要条件是(B)A.A0B.A0C.A*0D.A*0设A B C,
3、均为n阶可逆矩阵,则()ACB1(D)A.()BAC111B.B CA11C.ACB111()D.()BCA111设A B C,均为n阶可逆矩阵,则下列等式成立的是(A)A.()ABAABB2222B.()AB BBAB2C.()221111ABCCBAD.()22ABCC B A(二)填空题(每小题2 分,共 20 分)2101400017 11111111x是关于x的一个一次多项式,则该多项式一次项的系数是2 若A为34矩阵,B为25矩阵,切乘积AC B有意义,则C为54 矩阵二阶矩阵A110151051设AB124034120314,,则()AB815360设A B,均为 3 阶矩阵,且
4、AB3,则2AB72 设A B,均为 3 阶矩阵,且AB13,,则312()A B3 若Aa101为正交矩阵,则a0|精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 2 页,共 18 页文档编码:CM6W7Z8I10N1 HS6Y4D8J8K3 ZE3J8Q9Q9A9文档编码:CM6W7Z8I10N1 HS6Y4D8J8K3 ZE3J8Q9Q9A9文档编码:CM6W7Z8I10N1 HS6Y4D8J8K3 ZE3J8Q9Q9A9文档编码:CM6W7Z8I10N1 HS6Y4D8J8K3 ZE3J8Q9Q9A9文档编码:CM6W7Z8I10N1 HS
5、6Y4D8J8K3 ZE3J8Q9Q9A9文档编码:CM6W7Z8I10N1 HS6Y4D8J8K3 ZE3J8Q9Q9A9文档编码:CM6W7Z8I10N1 HS6Y4D8J8K3 ZE3J8Q9Q9A9文档编码:CM6W7Z8I10N1 HS6Y4D8J8K3 ZE3J8Q9Q9A9文档编码:CM6W7Z8I10N1 HS6Y4D8J8K3 ZE3J8Q9Q9A9文档编码:CM6W7Z8I10N1 HS6Y4D8J8K3 ZE3J8Q9Q9A9文档编码:CM6W7Z8I10N1 HS6Y4D8J8K3 ZE3J8Q9Q9A9文档编码:CM6W7Z8I10N1 HS6Y4D8J8K3 ZE3
6、J8Q9Q9A9文档编码:CM6W7Z8I10N1 HS6Y4D8J8K3 ZE3J8Q9Q9A9文档编码:CM6W7Z8I10N1 HS6Y4D8J8K3 ZE3J8Q9Q9A9文档编码:CM6W7Z8I10N1 HS6Y4D8J8K3 ZE3J8Q9Q9A9文档编码:CM6W7Z8I10N1 HS6Y4D8J8K3 ZE3J8Q9Q9A9文档编码:CM6W7Z8I10N1 HS6Y4D8J8K3 ZE3J8Q9Q9A9文档编码:CM6W7Z8I10N1 HS6Y4D8J8K3 ZE3J8Q9Q9A9文档编码:CM6W7Z8I10N1 HS6Y4D8J8K3 ZE3J8Q9Q9A9文档编码:
7、CM6W7Z8I10N1 HS6Y4D8J8K3 ZE3J8Q9Q9A9文档编码:CM6W7Z8I10N1 HS6Y4D8J8K3 ZE3J8Q9Q9A9文档编码:CM6W7Z8I10N1 HS6Y4D8J8K3 ZE3J8Q9Q9A9文档编码:CM6W7Z8I10N1 HS6Y4D8J8K3 ZE3J8Q9Q9A9文档编码:CM6W7Z8I10N1 HS6Y4D8J8K3 ZE3J8Q9Q9A9文档编码:CM6W7Z8I10N1 HS6Y4D8J8K3 ZE3J8Q9Q9A9文档编码:CM6W7Z8I10N1 HS6Y4D8J8K3 ZE3J8Q9Q9A9文档编码:CM6W7Z8I10N1
8、HS6Y4D8J8K3 ZE3J8Q9Q9A9文档编码:CM6W7Z8I10N1 HS6Y4D8J8K3 ZE3J8Q9Q9A9文档编码:CM6W7Z8I10N1 HS6Y4D8J8K3 ZE3J8Q9Q9A9文档编码:CM6W7Z8I10N1 HS6Y4D8J8K3 ZE3J8Q9Q9A9文档编码:CM6W7Z8I10N1 HS6Y4D8J8K3 ZE3J8Q9Q9A9文档编码:CM6W7Z8I10N1 HS6Y4D8J8K3 ZE3J8Q9Q9A9文档编码:CM6W7Z8I10N1 HS6Y4D8J8K3 ZE3J8Q9Q9A9文档编码:CM6W7Z8I10N1 HS6Y4D8J8K3 Z
9、E3J8Q9Q9A9文档编码:CM6W7Z8I10N1 HS6Y4D8J8K3 ZE3J8Q9Q9A9文档编码:CM6W7Z8I10N1 HS6Y4D8J8K3 ZE3J8Q9Q9A9文档编码:CM6W7Z8I10N1 HS6Y4D8J8K3 ZE3J8Q9Q9A9文档编码:CM6W7Z8I10N1 HS6Y4D8J8K3 ZE3J8Q9Q9A9文档编码:CM6W7Z8I10N1 HS6Y4D8J8K3 ZE3J8Q9Q9A9文档编码:CM6W7Z8I10N1 HS6Y4D8J8K3 ZE3J8Q9Q9A9文档编码:CM6W7Z8I10N1 HS6Y4D8J8K3 ZE3J8Q9Q9A9文档编
10、码:CM6W7Z8I10N1 HS6Y4D8J8K3 ZE3J8Q9Q9A9文档编码:CM6W7Z8I10N1 HS6Y4D8J8K3 ZE3J8Q9Q9A9文档编码:CM6W7Z8I10N1 HS6Y4D8J8K3 ZE3J8Q9Q9A9文档编码:CM6W7Z8I10N1 HS6Y4D8J8K3 ZE3J8Q9Q9A9文档编码:CM6W7Z8I10N1 HS6Y4D8J8K3 ZE3J8Q9Q9A9文档编码:CM6W7Z8I10N1 HS6Y4D8J8K3 ZE3J8Q9Q9A9文档编码:CM6W7Z8I10N1 HS6Y4D8J8K3 ZE3J8Q9Q9A9word 文档 可自由复制编辑矩
11、阵212402033的秩为2 设AA12,是两个可逆矩阵,则AOOA1211211AOOA(三)解答题(每小题8 分,共 48 分)设ABC123511435431,,求AB;AC;23AC;AB5;AB;()ABC答案:8130BA4066CA73161732CA01222265BA122377AB801512156)(CAB设ABC121012103211114321002,,求ACBC解:10221046200123411102420)(CBABCAC已知AB310121342102111211,,求满足方程32AXB中的X解:32AXB2521127125112345117252238
12、21)3(21BAX写出 4 阶行列式|精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 3 页,共 18 页文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 H
13、U5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 Z
14、A4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编
15、码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7
16、 HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3
17、 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文
18、档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8word 文档 可自由复制编辑1020143602533110中元素aa4142,的代数余子式,并求其值答案:
19、0352634020)1(1441a45350631021)1(2442a用初等行变换求下列矩阵的逆矩阵:122212221;1234231211111026;1000110011101111解:(1)919292929192929291100010001919292031320323110021020112201203231900630201102012001360630221100010001122212221|2313323212312122913123222rrrrrrrrrrrrrrIA9192929291929292911A(2)35141201132051717266221A(过
20、程略)(3)11000110001100011A求矩阵1011011110110010121012113201的秩解:|精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 4 页,共 18 页文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU
21、5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA
22、4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编码
23、:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7
24、HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3
25、ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档编码:CS9V3V6O2Y7 HU5J5C6O10P3 ZA4K8E6O8B8文档
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