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Rajan@2021
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Asked: 2021-04-01T11:00:43+05:30 In:

The sum of the first n terms of an AP is (5n^2/2 + 3n/2). Find the nth term and the 20th term of this AP.

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One of the most important and exam oriented question from arithmetic progression chapter in which we have been asked to find the nth term and the 20th term of the AP, if the sum of the first n terms of an AP is (5n^2/2 + 3n/2).

Book RS Aggarwal, class 10, chapter 5C, question no 6(i)

cbseclass 10rs aggarwal
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    1. Guru
      The sum of the first n terms of an AP is (5n^2/2 + 3n/2). Find the nth term and the 20th term of this AP.

      Hence the 20th term is 99.

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