If A= ( begin{bmatrix}a&b c&d end{bmatrix} ), then which of the follo – McqOptions

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1.	If A= ( begin{bmatrix}a&b c&d end{bmatrix} ), then which of the following is skew-symmetric?
A.	AA
B.	A+A
C.	2(A+A )
D.	A-A
Answer» D. A-A

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