Question

In the A.P 7,14 ,21,.... how many terms are there to consider for getting some 5740

Answer 1

use formula of ap bro it is so easy

Answer 2

a=7
d=14-7=7
An=5740

An=a+(n-1)d
5740=7+(n-1)7
7(n-1)=5740-7
(n-1)=5733/7
n-1=819
n=819+1
n=820