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Let A and B are two matrices of same or...

Let A and B are two matrices of same order i.e.
where `A=[(1,-3,2),(2,K,5),(4,2,1)], B=[(2,1,3),(4,2,4),(3,3,5)]`
If K = 2 then tr (AB) + tr (BA) is equal to

A

66

B

42

C

84

D

63

Text Solution

Verified by Experts

The correct Answer is:
C
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