Home/ Questions/Q 6187
In Process
Adv
deepaksoni
  • 0
Guru
Asked: 2021-05-09T22:26:35+05:30 In:

Problem 6: Justify whether it is true to say that the sequence, having following nth term is an A.P. (i) an = 2n – 1

  • 0

This is arithmetic progression based question from Chapter name- Arithmetic Progression
Chapter number- 9
Exercise – 9.2

We have been given the nth term of the sequence, and we have to find our whether it is AP or not.

CBSE DHANPAT RAI PUBLICATIONS
Understanding CBSE Mathematics
Class :- 10th
Question no 6(i)

arithmetic progressionsclass 10rd sharma
Share

    1 Answer

    1. Guru

      Solution:

      Now putting n = 1, 2, 3, 4 we get,

      a1 = 2.1 – 1 = 1

      a2 = 2.2 – 1 = 3

      a3 = 2.3 – 1 = 5

      a4 = 2.4  – 1 = 7

      We can see that,

      a2 – a1 = 3 – (1) = 2

      a3 – a2 = 5 – (3) = 2

      a4 – a3 = 7 – (5) = 2

      Since, the successive difference of list is same i.e 2

      Hence, the given sequence is in A.P

      • 0
    Leave an answer

    Leave an answer

    Browse

    Choose from here the video type.

    Put Video ID here: https://www.youtube.com/watch?v=sdUUx5FdySs Ex: "sdUUx5FdySs".

    Captcha Click on image to update the captcha.

    Related Questions

    Adv