This is the Important question based on Arithmetic progression Chapter of R.S Aggarwal book for ICSE & CBSE Board.
In this Question the sum of first two terms of an AP is given. you have to find the sum of ...

An Important question based on Arithmetic progression Chapter of R.S Aggarwal book for ICSE & CBSE Board.
Here the nth term of AP is n times and the second nth term of AP is n times you have to show ...