Question

How to find n term if sum of n term is given

Answer 1

First,find sum of first term. This is same as first term of the AP(a).
Then find sum of 2nd term.
Substract 2(S1) from S2.
[Substract sum of 1st term 2times from sum of first 2 term.
You will get common difference (d) by this.

n th term=a+(n-1)d
=a-d+nd

^ apply 'a' and 'd' to this