3 2 1. A = 4 3 } ], b = [ 3 ] 5 6 THEOREM 2 Inverses of 2 x 2 Matrices The 2 × 2 matrix A = [a b] is invertible if and only if ad - - bc 0, in which case 1 d-b A = ad - bc [ (9) -C a
3 2 1. A = 4 3 } ], b = [ 3 ] 5 6 THEOREM 2 Inverses of 2 x 2 Matrices The 2 × 2 matrix A = [a b] is invertible if and only if ad - - bc 0, in which case 1 d-b A = ad - bc [ (9) -C a
Algebra: Structure And Method, Book 1
(REV)00th Edition
ISBN:9780395977224
Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Publisher:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Chapter7: Applying Fractions
Section7.5: Percents
Problem 14WE
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First, apply the formulas in (9) to find A-1. Then use A-1 to solve the system Ax=b.
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