[" show that "2n-9n+7=0" ."],[" In the e...

[" show that "2n-9n+7=0" ."],[" In the expansion of "(1+x)^(n)" the binomial coefficients of three consecutive terms are "],[" respectively "220,495" and "792," find the value of "n.],[" If the coefficients of "2nd,3rd" and "4th" terms in the expansion of "(1+x)^(n)" are in A.P."]

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