Lecture 8: Solving Ax = b: row reduced form R

Solving Ax = b: row reduced form R When does Ax = b have solutions x, and how can we describe those solutions? Solvability conditions on b We again use the example: ⎡ ⎤ 1 2 2 2 A = ⎣ 2 4 6 8 ⎦ . 3 6 8 10 The third row of A is the sum of its first and second rows, so we know that ................
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