Adv
Rajan@2021
  • 0
Guru

Which term of AP 3,10,17…., will be 84 more than its 13th term

  • 0

One of the most important question of ML Agarwal of Class10.
Which term of AP 3,10,17…., will be 84 more than its 13th term?
ML Agarwal (avichal publication) class10, arithmetic progression, chapter9, question no. 18

Share

1 Answer

  1. Clearly, the given sequence is an AP with first term a=3 and common difference d=7.
    Let the nth term is 84 more than its 13th term.
    an=a13+84
    a+(n1)d=(a+12d)+84
    (n1)d=12d+84
    (n1)7=12×7+84
    (n1)7=7(12+12)
    n1=24
    n=25
    Therefore 25th term is required term.

    • 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