If the sum of first n terms of an AP 2,4,6, . . . 240, then the value of n is

If the sum to first n terms of the AP 2, 4, 6, ……. Is 240, then the value of n is

If the sum to first n terms of the A.P. 2, 4, 6, …. is 240, then the value of n is

If the sum of the first 2n terms of the AP 2, 5, 8 ....is equal to the sum of first n terms of the AP 57, 59, 61, ..., then what is the value of n?

The first term of an AP is 148 and the common difference is -2. If the AM of first n terms of the AP is 125, then the value of n is

If the sum of first n terms of an A.P. series is n^(2) +2n, then the term of the series having value 201 is-

If the sum of first n terms of an A.P. is cn^(2) , then the sum of squares of these n terms is :

If the sum of first n terms of an A.P. is cn^(2) then the sum of squares of these n terms is

If the sum of first n terms of an A.P. is cn^(2) then the sum of squares of these n terms is

If the sum of first n terms of an AP is cn^(2) , then the sum of squares of these n terms is