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in Matrices & determinants by (41.3k points)

Let A = [(5, 5α, α), (0, α, 5α), (0, 0, 5)] If A2 = 25, then |α| equals 

(A) 52 

(B) 1 

(C) 1/5 

(D) 5

1 Answer

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Answer is (C) 1/5

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