If A=[(2,3),(1,-2)] and A^(-1)=alphaA, t...

If `A=[(2,3),(1,-2)]` and `A^(-1)=alphaA,` then `alpha` is equal to

A

7

B

`-7`

C

`(1)/(7)`

D

`-(1)/(7)`

Verified by Experts

The correct Answer is:

c

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