In this Question the *n*th term of an AP is given.

you have to find its common difference.

This is the Important question based on Arithmetic progression Chapter of R.S Aggarwal book for ICSE & CBSE

Board.

This is the Question Number 6 Of Exercise 11 D of RS Aggarwal Solution.

Deepak BoraNewbie

# The nth term of an AP is (7-4n). Find its Common difference.

Share

According to question

nth term of an AP = 7 -4n

e.g T_n = 7 -4n

put n = 1 then T_1 = 7 – 4= 3

put n = 2 then T_2 = 7 -4× 2 = 7-8 = -1

common difference = T_2 – T_1 = -1 -3 = -4

hence common difference = -4