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Let A=3a-125cb82 is symmetric and B=d3ab-ae-2b-c-26-f is skew-symmetric, find AB

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a
AB=4-3631542628950
b
AB=43631542628950
c
AB=43631542628950
d
AB=43631-542628950

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detailed solution

Correct option is B

 A is symmetric

 c=8, b=-1 and a=2 and B is skew-symmetric       ..(i)

 d=e=f=0 and 2b+c=6, a=2, b-a=-3           ..(ii)

From Eqs. (i) and (ii), we get

a=2, b=-1, c=8, d=0, e=0, f=0

 A=32-1258-182 and B=032-30-6-260

 AB=-43-6-3154-26-289-50

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