If the number of observations ‘n’ in a dataset is even, then the median value is given by ____.
If the nth term of the sequence is given by (n3+1)(n+1) , 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
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