Question

State True or False: In an AP which has n terms, if we know the first and the last term, then we can find the sum of all the terms.

• A. True
• B. False

Answer 1

The correct option is A True

$S_n=\frac{n(a_1+a_n)}{2}$
where,
$S_n$ is the sum of n terms and n = number of terms
$a_1$ is the first term
and $a_n$ is the last term
So, if the number of terms, the first term and the last term of an AP are given, we can find the sum of n terms of that AP.