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Let A=[[1, -1, 1],[ 2, 1, -3],[ 1, ...

Let ` A=[[1, -1, 1],[ 2, 1, -3],[ 1, 1, 1]] `and ` 10 B = [[4, 2 , 2],[ -5, 0, alpha],[ 1, -2, 3]]`.If B is the inverse of matrix A , then alpha is

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