Question: The trace of a square matrix A is the sum of the diagonal entries in A and is denoted by tr A. It can be

The trace of a square matrix A is the sum of the diagonal entries in A and is denoted by tr A. It can be verified that tr(FG) = tr(GF) for any two n x n matrices F and G. Show that if
A and B are similar, then tr A = tr B.

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