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If A=[5a-b3 2] and A adj A=AA^T , then ...

If `A=[5a-b3 2]` and A adj `A=AA^T` , then `5a+b` is equal to: (1) `-1` (2) 5 (3) 4 (4) 13

A

`-1`

B

`5`

C

`4`

D

`13`

Text Solution

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The correct Answer is:
B
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