Question: 7. (20 points) Let A = 3 b (a) (15 points) Solve the linear system Ax = b by Gaussian elimination and express the general

7. (20 points) Let A = 3 b (a) (15 points)

7. (20 points) Let A = 3 b (a) (15 points) Solve the linear system Ax = b by Gaussian elimination and express the general solution in vector form. (b) (5 points) Write down the corresponding homogenous system Ax = 0 explicitly and determine all non-trivial solutions from (a) without resolving the system

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