Question

How many terms of the ap 3 7 11 15 are needed to get the sum 1275?

Answer 1

Hello friends!!

Here is your answer :

AP : 3, 7, 11, 15

First term a = 3

Common difference d = 7 - 3 = 4

Now,see the attached file..

Hence,

25 terms of the AP are needed to get the sum 1275.

Hope it helps you

^_^