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If [{:(1,3),(0,1):}]A=[{:(1,-1),(0,1):}]...

If `[{:(1,3),(0,1):}]A=[{:(1,-1),(0,1):}]`, then what is the matrix A ?

A

`[{:(1,-3),(0,1):}]`

B

`[{:(2,2),(0,2):}]`

C

`[{:(-4,-1),(1,0):}]`

D

`[{:(1,-4),(0,1):}]`

Text Solution

Verified by Experts

The correct Answer is:
D

Let `B=[{:(1,3),(0,1):}]and C = [{:(1,-1),(0,1):}]`
then `B^(-1)=[{:(1,-3),(0,1):}]`
Now, BA = C
`rArr B^(-1) BA = B^(-1)C`
`rArr A = B^(-1)C`
`=[{:(1,-3),(0,1):}][{:(1,-1),(0,1):}]=[{:(1,-4),(0,1):}]`
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