(a) For (x^(2)-(1)/(x))^(n) T(r+1)=^(n)C(r )(x^(2))^(n-r)(-1)^(r )x^(-r)=^(n)C(r )x^(2n-3r)(-1)^(r ) Constant term =^(n)C(r )(-1)^(r ) if 2n=3r i.e. coefficient of x=0 Hence .^(n)C(2n//3)(-1)^(2n//3)=15=^(6)C(4)...
52 View Solution If the first three terms in the binomial expansion of(1+bx)nin ascending powers of x are 1,6x and16x2respectively then b + n = View Solution Free Ncert Solutions English Medium NCERT Solutions NCERT Solutions for Class 12 English Medium ...