The first term of an A.P. is 2 and the nth term is 41. What is the value of n, if `S_(n) = 860` ?

The first term of an A.P. is 2 and the nth term is 29 . If S_(n) = 465 , then what is the value of n ?

The first term of an A.P. is 1 and nth term is 25 If S_(n)=520 , then n = ….

The mth term of an A.P. is n and nth term is m. Then rth term of it is

If the mth term of an A.P is n and nth term is m , then pth term =

The rth terms of an A.P is n and it's nth term is r, show that its mth term is r+n - m.

The sum of first n terms of an A.P. is 5n^(2) + 3n . If the nth term is 168, find the value of n. Also find the 20th term of the A.P.

The nth term of an A.P. is (1)/(n) and nth term is (1)/(m). Its (mn)th term is :

Choose the correct alternative: The first term of an A.P. is 1 and nth term is 25 . If S_n=520 , then n=….

Find the sum of first n terms of an A.P. whose nth term is 3n+1.

If mth terms of an A.P . Is n and nth term is m, then (m + n)th term is