The expansion of a 3x3 determinant can be remembered by this device. Write a second copy of the first two columns to the right of the matrix, and compute the determinant by multiplying entries on six diagonals. Add the downward diagonal products and subtract the upward products. Use this method to compute the following determinant. ra11 a12 a13] a11 a12 3 25 a21 a22 a23 azí a22 2 3 0 a31 a32 a33 a31 a32 - 4 0 1 3 25 2 3 0 = - 4 0 1

The expansion of a 3x3 determinant can be remembered by this device. Write a second copy of the first two columns to the right of the matrix, and compute the determinant by multiplying entries on six diagonals. Add the downward diagonal products and subtract the upward products. Use this method to compute the following determinant. ra11 a12 a13] a11 a12 3 25 a21 a22 a23 azí a22 2 3 0 a31 a32 a33 a31 a32 - 4 0 1 3 25 2 3 0 = - 4 0 1

Algebra and Trigonometry (MindTap Course List)

4th Edition

ISBN:9781305071742

Author:James Stewart, Lothar Redlin, Saleem Watson

Publisher:James Stewart, Lothar Redlin, Saleem Watson

Chapter11: Matrices And Determinants

Section11.CR: Chapter Review

Problem 11CC

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