Question: Problem 16 [10 pts] For an n x n matrix A, pA(t) = t - q(t) for some polynomial q(t) precisely when Det(A) = 0.

Problem 16 [10 pts] For an n x n matrix A, pA(t) = t - q(t) for some polynomial q(t) precisely when Det(A) = 0. Problem 17 [10 pts] If W C R" is a subspace and v E R", then pw(v) is the least-squares approximation to v by a vector in W except when pw(v) = 0

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