Given that A = [1 3 0 -1 4 -15 3 2 0] and b = [2 -2 0]. To use Cramer's rule to compute x1 of Ax = b in the following three steps. (a). (4 points) Compute |A| = (6). (4 points) Compute |A1((b)| = (c). (2 points) Then, x1 =
Added by Brittany W.
Step 1
We can use the formula for a 3x3 matrix: |A| = 1(4*0 - (-15)*2) - 3(-1*0 - (-15)*3) + 0(-1*2 - 4*3) = 8 + 135 = 143 Therefore, |A| = 143. (b) To compute |A1((b)|, we need to replace the first column of A with the column vector b and find the determinant Show more…
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