Question

1. In an A.P first term is 'a', nth term is 'l' then the sum of nth term is
A) (2a-1) B) (2a+1) c)2(a+1) D) (a-1)​

Answer 1

Answer:

(C) n/2 (a+1)

Explanation:

First term = a

nth term = 1

Sn = n/2 (a+an)

=n/2 (a+1) (C)