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If A=[(3,4),(7,9)] and AB=I then B=...

If `A=[(3,4),(7,9)]` and `AB=I` then `B=`

A

`[(9,4),(7,-3)]`

B

`[(-9,4),(7,-3)]`

C

`[(9,-4),(7,-3)]`

D

`[(9,-4),(7,-3)]`

Text Solution

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The correct Answer is:
B
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