Let A 3 2 7 8 17 1 C22 30 000 5 5 29 0 Then the cofactors C12 2 2 6 3 0 0 0 00 1 the determinant det A and 4 Recall Cramer s Rule Given Ax b if det A 0 then If Ax 14 4 4 0 0 then ag det A det A 1 where A is obtained from A by replacing its ith coll Simplify your answer
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