3 + 5 + 7 + .... to n term is
If 1+1+22+1+2+33+....to n terms is S. Then, S is equal to
If the general term of a sequence is given by (n2+n)n , then the sum of first n terms of the sequence is given by
If the nth term of the sequence is given by (n2−1)(n+1) , then the sum of first n terms of the sequence is given by