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Which of the following is incorrect...

Which of the following is incorrect

A

`A^(2)-B^(2)=(A+B)(A-B)`

B

`(A^(T))^(T)=A`

C

`(AB)^(n)=A^(n)B^(n)`, where A, B commute

D

`(A-I)(I+A)=OhArr A^(2)=I`

Text Solution

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The correct Answer is:
A
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