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If matrix A=[(a,b),(c,d)], then |A|^(-1)...

If matrix `A=[(a,b),(c,d)]`, then `|A|^(-1)` is equal to

A

ad-bc

B

`(1)/(ad-bc)`

C

`(1)/(ad-bc){:[(d,-b),(-c,a)]:}`

D

`|adj.(A)|`

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The correct Answer is:
B
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