Home
Class 11
MATHS
(a) The sum of 'n' terms of a progressio...

(a) The sum of 'n' terms of a progression is n(n + 1). Prove that it is an A..P. Also find its 10th term. (b) The sum of 'n' terms of a progression is `(3n^(2) - 5n).` Prove that it is an A.P. (c) If the sum of n terms of a series is `(5n^(2) + 3n)` then find its first five terms.

Promotional Banner

Similar Questions

Explore conceptually related problems

The sum of n terms of a series is n(n+1) . Prove that it is an A.P. also find its 10th term.

The sum of n terms of a series is n(n+1) . Prove that it is an A.P. also find its 10th term.

(i) The nth term of a progression is 2n+1. Prove that it is an A. P. Also find its 5th term. (ii) The nth term of a progression is linear expansion in 'n' . Show that it is an A.P. (iii) The nth term of a progression is (n^(2)+1) . Show that it is not an A.P.

The sum of 'n' terms of a progression is (n^(2)+5n). Prove that it is arithmetic progression. Also find its common difference.

If sum of n terms in an A.P is ((5n^2)/2+(3n)/2) then find its 20th term

If the sum of first n terms of an A.P. is 3n^2 + 2n , find its r^(th) term.

The sum of n terms of an A.P. is n^(2) + 3n . Find its 20th term.

If the sum of n terms of a series is S_(n)=n(5n-3) find the n^(th) term and p^(th) term

If the sum of n terms of an A.P. is given by S_(n) =(3n^(2)+2n) , find its n^(th) term.

The sum of n terms of an A.P.is 3n^(2)+5n. Find the A.P.Hence find its 15 th term.