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If 3^n is a factor of the determinant |{...

If `3^n` is a factor of the determinant `|{:(1,1,1),(.^nC_1,.^(n+3)C_1,.^(n+6)C_1),(.^nC_2, .^(n+3)C_2, .^(n+6)C_2):}|` then the maximum value of n is ……..

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