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[" 18.The coeficient of "x^(20)" in the ...

[" 18.The coeficient of "x^(20)" in the copansion of "(1+x^(2))^(40)(x^(2)+2+(2)/(x^(2)))" ,wh "],[[" a) "30_(10)," b) "30C_(25)],[" c) "1," d) None of these "]]

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