Ex 5.2, 2 - (i) Choose  correct choice and justify 30th term

Ex 5.2, 2 - Chapter 5 Class 10 Arithmetic Progressions - Part 2

 

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Ex 5.2, 2 (i) Choose the correct choice in the following and justify 30th term of the A.P: 10, 7, 4, …, is A. 97 B. 77 C. − 77 D. − 87 Given AP 10, 7, 4, …. We have to find 30th term So, n = 30 a = 10 & d = 7 – 10 = –3 Putting these in formula an = a + (n – 1) d a30 = 10 + (30 – 1) × (–3) = 10 + 29 × (–3) = 10 + (–87) = –77 So, Option C is correct

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Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 14 years. He provides courses for Maths, Science and Computer Science at Teachoo