IF 8th term of an A.P. is 15, then the sum of 15 terms is

If 8^(th) of an A.P. is 15 , then the sum of first 15 terms is

If 8^(th) of an A.P. is 15 , then the sun of first 15 terms is

If the 8th term of an A.P. is 31 and the 15th term is 16 more than the 11th term, find the A.P.

The sum of the 4th term and the 8th term of an A.P is 24 and the sum of the 6th term and the 10th term is 44. Find the first three terms of the A.P.

If the 8th term of an A.P. is 37 and the 15th term is 15 more than the 12th find the A.P. Also find the sum of first 20 terms of this A.P.

If the 8th term of an A.P.is 31 and the 15 th term is 16 more than the 11 th term,find the A.P.

The sum of 4th and 8th term of an A.P. is 24 and the sum of 6th and 10th term is 44. Find the A.P.

If sum of 3rd and 8th term of an A.P is 7 and sum of 7th and 14th term is -3 , then find 10th term.

The sum of first 8 terms of an A.P. is 64 and that of first 15 terms is 225. Find the sum of its first 17 terms.

The sum of first 8 terms of an A.P. is 64 and that of first 15 terms is 225. Find the sum of its first 17 terms.