sum_(r=0)^(n)((^nc_(r-1))/(^nc_(r)+^(n)c_(r-1)))^(3)=(25)/(24)

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

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

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

The value of sum_(r=0)^(n-1)(nC_(r))/(nC_(r)+^(n)C_(r+1)) is eqaul to

Find the sum sum_(r=1)^(n)r^(2)(^nC_(r))/(n_(C_(r-1)))

sum_(r=1)^(n) (-1)^(r-1) ""^nC_r(a - r) =

sum_(r=1)^(n) (-1)^(r-1) ""^nC_r(a - r) =

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