Q. If $A$ is a matrix of order $3 \times 3$ , then $(A^{2})^{- 1}$ is equal to

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A

$(- A^{2})^{2}$

10%

B

$A^{2}$

25%

C

$(A^{- 1})^{2}$

54%

D

$(- A)^{- 2}$

11%

Solution:

$(A^{2})^{- 1} = (A^{- 1})^{2}$