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Question 1. Find: (iii) nth term of the AP 13, 8, 3, -2, ………

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This is arithmetic progression based question from Chapter name- Arithmetic Progression
Chapter number- 9
Exercise – 9.4
In this question we have been given the arithmetic progression. Also we have to find the nth term of this progression

CBSE DHANPAT RAI PUBLICATIONS
Understanding CBSE Mathematics
Class :- 10th
Question no 1(iii)

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1 Answer

  1. Given that,

    A. P. is 13, 8, 3, – 2, …………

    First term (a) = 13,

    Common difference (d) = Second term first term

    d = 8 – 13 = – 5

    As we know that, to find nth term in an A.P = a + (n – 1)d

    = 13 + (n – 1) – 5 = 13 – 5n + 5

    Hence nth term of the A.P is an = 18 – 5n

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