Question

Find the next four terms of following A.P.

1
/6,

1
/4,

1
/3

Also, find Sn ?​

Answer 1

Common difference = 1/12

a= 1st term= 1/6

Nth term formula= a+(n-1)d

You have to find 4th, 5th,6th,7th term

So, just put values of n in that equation

SUM for AP= n/2 × {2a + (n-1)d}

But the thing is, you must know the LAST TERM