The sum of first 14 terms of an AP is 1050 and its first term is 10, then find the 21st term of the AP.

If the sum of first 14 terms of an A.P. is 1050 and its first term is 10, find the 20^(th) term.

If the sum of the first 14 terms of an AP is 1050 and its first term is 10, find the 20^(th) term.

Sum of the first 14 terms of an AP is 1505 and its first term is 10. Find is 25 th term.

If the sum of first 10 terms of an A.P is 60 and sum of first 15 terms is -165 then find the sum of its n terms

The sum of the first 9 terms of an AP is 81 and that of its first 20 terms is 400. Find the first term and the common difference of the AP

If the sum of first 6 terms of A.P.is 96 and sum of first 10 terms is 240 ,then find the sum of n terms of A.P.

If the sum of first 7 terms of an A.P is 49 and that of its first 17 terms is 289, find the sum of first n terms of the A.P

The 11th term of an A.P. is 16 and the 21st term is 29 . Find the 16th term of this A.P.

If the sum of first p terms of an A.P. is equal to the sum of the first q terms, then find the sum of the first (p+q) terms.