Class 11

Math

Algebra

Sequences and Series

Choose the correct statements -

- AP can be written as a, (a+d), (a+2d), (a+3d), .........
- List of integer forms an A.P.
- $n_{th}$ term in A.P. can be written as $S_{n}−S_{n−1}$ where $S_{n}$ means sum of n terms
- If the nth term of the A.P. is $l$, then $S=2n [a−l]$

List of integer form an A.P.

$n_{th}$ term in A.P. can be written as$S_{n}−S_{n−1}$ where $S_{n}$ means the sum of n terms.

If the nth term of the A.P. $l$, then $S_{n}=2n [a+l]$