" 6.Sum of first "55" terms in an A.P.is "3300" ,find its "28^(" th ")" term "

Sum of first 55 terms in an A.P is 3300 . Find its 28th term.

The sum of the first n terms of an A.P.is 3n+n^(2) find "(1)" the first term "(2)" and the sum of the first two terms

The sum of first six terms of an AP.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.

The sum of first 15 terms of an A.P. is 750 and its first term is 15. Find its 20th term.

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

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.

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)

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

The sum of first 7 terms of an A.P.is 10 and that of next 7 terms is 167. Find the progression.