Question

The sums of first n terms of 3 APs are S1,S2 and S3.
The first term of each is 5and their common differences are 2,4 and 6 respectively. Prove that S1 + S3 =2S2.
A class 10th question.....Q59​

if u will explain properly I will follow you.

Answer 1

It is easy....
Sum of 1st AP Is :Sn=n/2(2a+n-1*d)
and same for the next 2 APs...
Solve by substituting the values in resp. Sums formula and equate according to question.
If not understand, reply will solve