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deepaksoni
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Asked: 2021-04-30T07:03:43+05:30 In:

Problem 2: Find the indicated terms in each of the following sequences whose nth terms are:(ii) an = (3n – 2)/(4n + 5), a7 and a8

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This is arithmetic progression based question from Chapter name- Arithmetic Progression
Chapter number- 9
Exercise – 9.1

We have to find the indicated terms asked in the question whose nth term is an = (3n – 2)/(4n + 5

CBSE DHANPAT RAI PUBLICATIONS
Understanding CBSE Mathematics
Class :- 10th
Question no 2 ( ii)

apclass 10rd sharma
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    1 Answer

    1. Guru

      Solution:

      Given:

      an = (3n – 2)/(4n + 5)

      a7 = By putting n=7

      = (3.7 – 2)/(4.7 + 5)

      =19/33

      a8 = By putting n = 8

      = (3.8 – 2)/(4.8 + 5)

      = 2 2/37

      ∴ The required terms a7 = 19/33, a8 = 22/37

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