" 1) In an A.P."19" th term is "52" and "38^(" th ")" term is "128," find sum of first "56" terms."

In an A.P. 19th term is 52 and 38th term is 128 . Find the sum of first 56 terms.

In an A.P. 19th term is 52 and 38th term is 128. Find the sum of first 56 terms.

In an A.P., if 5 ^(th) term is (1)/(7) and 7^(th) term is (1)/(5), then the sum of first 35 terms is

The A.P. in which 4^(th) term -15 and 9^(th) term is -30. Find the sum of first 10 numbers.

In an A.P. 10^(th) term is 46, sum of 5^(th) and 7^(th) term is 52. find the A.P.

The 104th term and 4th term of an A.P. are 125 and 0. Find the sum of first 35 terms.

In an A.P. the ratio of 7th term to 11th term is 19 : 31 and the sum of these two terms is 20.Find the sum of first twenty terms.

In an A.P 10th term is 46 , sum of 5th term and 7th term is 52 . Find the A.P.

If the sum of first 8 terms of an Arithmetic progression is 136 and that of first 15 terms is 465, then find the sum of first 25 terms. OR Ths sum of the 5th and 9th terms of an A.P. is 40 and the sum of the 8th and 14th term is 64. Find the sum of the first 20 terms.