`sum_(i=0)^n2^i` is equal to

sum_(i=1)^(n) sum_(i=1)^(n) i is equal to

sum_(i=1)^(n) sum_(i=1)^(n) i is equal to

If sum_(i=1)^(2n) sin^(-1) x_i =npi , then sum_(i=1)^(2n) x_i is equal to :

sum_(i = 1)^n sum_(j = 1)^i sum_(k = 1)^j 1 is equal to

sum_(i=1)^(n) sum_(j=1)^(i) sum_(k=1)^(j) 1, is equal to

sum_(0<=i<=j<=n)sum^(n)C_(i) is equal to

If sum_(i=1)^(2n) sin^(-1) x_i=npi , then sum_(i=1)^(2n) x_i equals :

The value of sum sum_(0<=i<=j<=n)(sim nC_(i)+^(n)C_(j)) is equal to

If a_(1),a_(2),a_(3),... are in A.P.and a_(i)>0 for each i,then sum_(i=1)^(n)(n)/(a_(i+1)^((2)/(3))+a_(i+1)^((1)/(3))a_(i)^((1)/(3))+a_(i)^((2)/(3))) is equal to

The value of sum_(i=0)^(r)C(n_(1),r-i)C(n_(2),i) is equal to