← GATE CSE 1994

Q1.2

MCQMarks unknown

Let $A$ and $B$ be real symmetric matrices of size $n \times n$ . Then which one of the following is true?

(A)

$AA'=I$

(B)

$A=A^{-1}$

(C)

$AB=BA$

(D)

$(AB)'=BA$

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