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IF A and B are squre matrices of order 3...

IF A and B are squre matrices of order 3, then the true statement is/are (where I is unit matrix).

A

det `(-A)=-` det A

B

det A = 0

C

det `(A+I)=1+` det A

D

det `2A=2` det A

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The correct Answer is:
A
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