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If A is square matrix such that A^(2)=A,...

If A is square matrix such that `A^(2)=A`, then `(I+A)^(3)-7A` is equal to
a. A
b. I − A
c. I
d. 3A

A

A

B

`I-A`

C

I

D

3A

Text Solution

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The correct Answer is:
C
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OMEGA PUBLICATION-MATRICES -MULTIPLE CHOICE QUESTIONS
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  13. If A=[(alpha,beta),(gamma,-alpha)] is such that A^(2)=I, then a. 1 ...

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  14. If the matrix A is both symmetric and skew symmetric, then :

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  15. If A is square matrix such that A^(2)=A, then (I+A)^(3)-7A is equal to...

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  16. A=[a(ij)](mxxn) is a square matrix, if a. m < n b. m > n c. m ...

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  20. Matrices A and B will be inverse of each other only if

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