aim of first n terms of an A.P.is 52. Find the term of this

The sum of first n terms of an A.P.is 5n-n^(2) . Find the nth term of this A.P.

The sum of the first n terms of an A.P.is 4n^(2)+2n. Find the nth term of this A.P.

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

The sum of first n terms of an A.P.is 5n^(2)+3n If its mth term is 168,(i) Find the value of m (ii) Find the 20th term of this AP

191.If the sum of first n terms of an A.P.is Zero,then the sum of next m terms,where a is the first term of the A.P.is

The sum of first p- terms terms of an A.P.is q and the sum of first q terms is p,find the sum of first (p+q)

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.

If the sum of first m terms of an A.P.is the same as the sum of its first n terms,show that the sum of tis (m+n) terms is zero.

The sum of n terms of an A.P.is an (n-1). Find the sum of the squares of these terms.

The sum of first six terms of an A.P.is 42. The ratio of its 10 th term to its 30 th term is 1:3. Find the first term of the A.P.