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Rajan@2021
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Which term of the AP 3, 8, 13, 18,…….is 88?

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A basic question from arithmetic progression chapter in which we have been asked to find which term of the AP 3, 8, 13, 18,…….is 88?

Book – RS AGGARWAL, class 10, Arithmetic Progression, chapter 5A,  question no 10

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1 Answer

  1. Let nth term is 88.
    AP is 3,8,13,18,....
    Here,
    First term =a=3
    Common difference =d=83=5
    nth term of AP is an=a+(n1)d
    Now,
    88=3+(n1)(5)
    883=(n1)×5
    n1=88/5
    or n=17+1=18
    Therefore, 88 is the 18th term.

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