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Unformatted text preview: A . Finally, a matrix is written with its entries enclosed by [ and ], and the determinant of a matrix is written with the entries of the matrix enclosed by  and  . EXAMPLE. Use two diﬀerent cofactor expansions to compute ± ± ± ± ± ± ± 12 1 34 5 2 0 ± ± ± ± ± ± ± . EXAMPLE. Calculate ± ± ± ± ± ± ± ± ± 1 21 3 4 6 1 2 1 1 8 32 0 4 0 ± ± ± ± ± ± ± ± ± . EXAMPLE. Explore the eﬀect of an elementary row operation on the determinant of a matrix. State the row operation and describe how it aﬀects the determinant. " a b c d # , " a + kc b + kd c d # HOMEWORK: SECTION 3.1...
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 Spring '09
 DANIELALLCOCK
 Linear Algebra, Determinant, Addition, Invertible matrix, det A., det Ain

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