Question: 4 only please. O 4 * 4 Prove that x = 0 is the only solution to Ax = 0 if and only if the

4 only please.

O 4 * 4 Prove that x = 0 is the only solution to Ax = 0 if and only if the rank of the p x q matrix A equals q, the number of unknowns. 5 Suppose that the system Ax = b of p equations in q unknowns has a solution Xo

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