大一线性代数练习题五套(带答案)(6)

100 a11a12a13 a11a13a12 05A A a21a22a23 ,B 2a212a232a22 ,P1 001 , a a 010aaaa3332 33 3132 31

100 P2 020 , B ( ). 001

(A)P1P2A;(B)AP2P1;(C)P1AP2;(D)P2AP1.05B n A n , A .05C

20 1 062 A 1113 1 19 71 410 .616 14 34 0

05D A , a,b ,

A

05E

1 0A 2 3 1111 1 121 3a 24b 3 515 c 8 11 01 1b .a4 23 3517 11

a,b,c . A .

05F n

a b

A b b

n 2. A .

.16.bab bbba b b b , b a