Question: In Problems 18, first apply the formulas in (9) to find A -1 . Then use A -1 (as in Example 5) to solve the

In Problems 1–8, first apply the formulas in (9) to find A-1. Then use A-1 (as in Example 5) to solve the system Ax = b.

= [$ A = 6 7 } ], b = 5 6

2 -3

= [$ A = 6 7 } ], b = 5 6 2 -3

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