" 73) "sum_(gamma=0)^(n)[(n(x-1)/(n(x+nc_(gamma)-1)))^(3)=(25)/(24)" the "

If sum_(r=0r=0)^(n){(C(n,r-1))/(C(n,r)+C(n,r-1))}^(3)=(25)/(24)

If sum_(r=0)^(n){("^(n)C_(r-1))/('^(n)C_(r )+^(n)C_(r-1))}^(3)=(25)/(24) , then n is equal to

If sum_(r=0)^(n-1)((^nC_(r))/(nC_(r)+^(n)C_(r+1)))^(3)=(4)/(5) then n=

If S_(n)=sum_(r=0)^(n)(1)/(nC_(r)) and sum_(r=0)^(n)(r)/(nC_(r)), then (t_(n))/(S_(n))=

If sum_(r=0)^(n)(r)/(nC_(r))=sum_(r=0)^(n)(n^(2)-3n+3)/(2*^(n)C_(r)), then n=1 b.n=2c.n=3d .none of these

If sum_(r=0)^(n-1)(("^nC_r)/(^nC_r+^nC_(r+1)))^3=4/5 then n=

If a_(n)=sum_(r=0)^(n)(1)/(nC_(r)), then sum_(r=0)^(n)(r)/(nC_(r)) equals

Find the sum of the series nC_(0)x^(3n)+(nC_(1))/(2)x^(3(n-1))(3-x^(3))+(nC_(2))/(3)x^(3(n-2))(3-x^(3))^(2)+......+(nC_(n))/(n+1)(3-x^(3))^(n)