How to calculate these ?
In an arithmetic progression, the sum of the first n term is given by # S_n = (9n)/2 - (3n^2)/2# . Look up the 6th term to the 18th term.
In an arithmetic progression, the sum of the first n term is given by
1 Answer
Jan 4, 2018
Given sum of first n terms of A P
We can write n th term of the series is
So
Inserting
Inserting
Inserting
Inserting