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[" A-5.If the second term of the expansi...

[" A-5.If the second term of the expansion "[a^(1/13)+(a)/(sqrt(a^(-1)))]^(n)" is "14a^(52)" ,then the value of "(^(n)C_(3))/(^(n)C_(2))" is: "],[[" (A) "4," (B) "3," (C) "12," (D) "6]]

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