Question: . Theorem 13: Let A be an (nxn) matrix. The equation Ax=b has a unique solution for every ( nx1) column vector b if and

. Theorem 13: Let A be an (nxn) matrix. The
. Theorem 13: Let A be an (nxn) matrix. The equation Ax=b has a unique solution for every ( nx1) column vector b if and only if A is nonsingular

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