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[" Let "A=|[5,5 alpha,alpha],[0,alpha,5 ...

[" Let "A=|[5,5 alpha,alpha],[0,alpha,5 alpha],[0,0,5]|." If "|A^(2)|=25," then "],[| alpha|" equals "],[" (A) "1/5],[" (B) "5],[" (D) "1]

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