If the first term of an AP is -5 and the common difference is 2, then the sum of the first 6 terms is

If the first term of an A.P. is 2 and common difference is 4, then the sum of its first 40 terms is-

The 5th term of an AP is -3 and its common difference is -4. The sum of its first 10 terms is

The sum of the first six terms of an AP is 48 and the common difference is 2. What is the 4th term of AP ?

The sum of the n terms of an AP is 2n^2+5n and its common difference is 6, then its first term is

If the sum of first k terms of an A.P. is 3k^2-k and its common difference is 6. What is the first term ?

The sum of the n terms of an AP is 2n^(2)+5n and its common difference is 6, then its first term is

The first term of an A.P is 6 and the common difference is 5. Find the A.P and its general term.

The sum of the first n terms of an AP whose first term is 8 and the common difference is 20, is equal to the sum of first 2n terms of another AP whose first terms is -30 and the common difference is 8. find n

If the sum of n terms of an A.P. be 3n^2-n and its common difference is 6, then its first term is

If (a)/(2) is the first term and d is the common difference of an AP, then the sum of n terms of the AP is _______.