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Gilbert Strang, Calculus, 3rd edition (Wellesley-Cambridge Press; MIT OpenCourseWare RES.18-001) §11.5 Linear Algebra, #34 · Linear Algebra · Matrices

The pivots in Problem 32a are … and

The pivots in Problem 32a are $1, - 1,$ and $4$ . Circle those as they appear along the diagonal in elimination. Check that the product of the pivots equals the determinant. (This is how determinants are computed.)

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Gilbert Strang, Calculus, 3rd edition (Wellesley-Cambridge Press; MIT OpenCourseWare RES.18-001) · §11.5 Linear Algebra, #34

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