Q. 124.9( 33 Votes )

# If , and A + A’ = I, if the value of a is

A.

B.

C.

D.

Answer :

Given A =

Therefore, A’ =

Also given that A + A’ = I

(Putting the values in the above equation)

We know when two matrices are equal only when all their corresponding elements or entries are equal i.e. if A = B, then a_{ij} = b_{ij} for all i and j.

This implies,

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