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Let psiA be defined as trace of a matrix...

Let `psi_A` be defined as trace of a matrix `A` which is sum of diagonal elements of a square matrix. `psi_(lambdaA+mu B) =`

A

(a) `lamdapsi_(A)+mupsi_(B)`

B

(b) `lamdapsi_(B)+mupsi_(A)`

C

(c) `lamdapsi_(AB)+mupsi_(BA)`

D

(d) none of these

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