Question: Current Attempt in Progress Suppose that a 4 x 4 matrix A has eigenvalues /1 = 1, /2= - 5, Ag =7, and /4 =-7.

Current Attempt in Progress Suppose that a 4 x 4 matrix A has eigenvalues /1 = 1, /2= - 5, Ag =7, and /4 =-7. Use the following method to find tr(A). If A is a square matrix and p(/) = det (// -A) is the characteristic polynomial of A, then the coefficient of A" - 1inp(/) is the negative of the trace of A. tr(A) = i

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