Find the sum of n terms of the sequence given by `a_(n)=(3^(n)+5n), n in N`.

Find the sum to n terms of the sequence given by a_(n)=2^(n),n in N

Find the sum to n terms of the sequence given by a_n=2^n,n in Ndot

Find the sum of n terms of the sequence (a_(n)), where a_(n)=5-6n,n in N

Find the sum to n terms of the sequence {a_n} , where a_n=5-6n, n in N .

Find the least value of n, for which the nth term a_(n) of the sequence given by a_(n) = n^(3) - n^(2) - 5n - 3 is non-negative.

Find the sum of n terms of an A.P.whose nth terms is given by a_(n)=5-6n

If n^(th) term of the sequences is a_(n)= (-1)^(n-1)5^(n+1) , Find a_(3) ?

If sum of n terms of a sequence is given by S_(n)=3n^(2)-5n+7&t_(r) represents its r^(th) term then

If sum of n terms of a sequence is given by S_(n)=2n^(2)+3n . Find its 50^(th) term.