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.

10 A x = [ 27 ]-=[ 9 ] 4 3 ,

b: 6 5

10 A x = [ 27 ]-=[ 9 ] 4 3 , b: 6 5

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