Find the cofactors of A and multiply ACT to find detA: A = 1 1 4 1 2 2 1 2 5 , C = 6 3 0
Chapter 4, Problem 4.4.20(choose chapter or problem)
Find the cofactors of A and multiply ACT to find detA: A = 1 1 4 1 2 2 1 2 5 , C = 6 3 0 , and ACT = . If you change that corner entry from 4 to 100, why is detA unchanged?
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