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7. 1/1 points | Previous Answers HoltLinAlg2 5.2.033.
For the given matrices A , B , C , and D verify that
8. 1/1 points | Previous Answers HoltLinAlg2 5.2.036.
Determine if a unique solution exists for the given linear system.
A = ,
2 1
0 4
B = ,
−1 0
2 1
C = ,
0 −2
−1 5
D =
1 2
= -37
det( A ) det( D ) − det( B ) det( C ) = -66
A B
C D
4 0
2
4
9. 1/1 points | Previous Answers HoltLinAlg2 5.2.051a.
Determine if the statement is true or false, and justify your answer.
Suppose that A is a matrix and that B is the matrix obtained by multiplying the third
column of A by 2 . Then
4
×
det( B ) = 2 det( A ).
4
3/4