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Given that A = [a(ij)] is a square matri...

Given that `A = [a_(ij)]` is a square matrix of order `3 xx 3 and |A| = −7`, then the value of `Sigma_i=1^(3) a_(12) A_(12)`, where `A_(ij)` denotes the cofactor of element `a_(ij)` is:

A

7

B

-7

C

0

D

49

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