Let A = (a(ij)(3xx3) be a matrix with a(...

Let A = `(a_(ij)_(3xx3)` be a matrix with `a_(ij ) in C`. Let B be a matrix obtained by inerchanging two columns of A . Then det (A+B) is equal to

det (A) +det (B)

2 det (A)

det( A) - det(B)

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