If `n in N ,sum_(k=1)^nsin^(- 1)(x_k)=(npi)/2"t h e n"sum_(k=1)^n x_k`

If n in N, sum_(k=1)^(n)sin^(-1(x_(k))=(npi)/2 then the value of sum_(k=1)^(n)x_(k)=

If n in N, sum_(k=1)^(n)cos^(-1)(x_(k))=npi then the value of sum_(k=1)^(n)sin^(-1)(x_(k))=

sum_(k =1)^(n) k(1 + 1/n)^(k -1) =

If sum_(k=1)^(n)k=210, find the value of sum_(k=1)^(n)k^(2).

If sum_(r=1)^(n) t_(r ) = sum_(k=1)^(n) sum_(j=1)^(k) sum_(i=1)^(j) 2 , then sum_(r=1)^(n) (1)/( t_(r )) equals :

Value of L = lim_(n->oo) 1/n^4 [1 sum_(k=1)^n k + 2sum_(k=1)^(n-1) k + 3 sum_(k=1)^(n-2) k +.....+n.1] is

If sum_(k=1)^(n)k=45, find the value of sum_(k=1)^(n)k^(3).

Evaluate : sum_(k=1)^n (2^k+3^(k-1))

Evaluate : sum_(k=1)^n (2^k+3^(k-1))