b. What is the vector ·b? When writing the following linear system of equations in the matrix form Ax a. What is the matrix A? -x 1 - 3 x 2 + 5x3 2 x 1 + 5 x 2 + 2x3 -3x1-2 x2-x3 = 0 = = 3 -2 = b

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