Ex 5.2, 5 (i) - Chapter 5 Class 10 Arithmetic Progressions

Last updated at April 16, 2024 by

Ex 5.2, 5 - Find number of terms in AP (i) 7, 13, 19, .. 205

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

 

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Ex 5.2, 5 Find the number of terms in the following AP (i) 7, 13, 19, …, 205 Given AP 7, 13, 19, … 205 Here, a = 7 d = 13 – 7 = 6 an = 205 We need to find n an = a + (n – 1) d 205 = 7 + (n – 1) × 6 205 – 7 = (n – 1) × 6 198 = (n – 1) × 6 198/6 = n – 1 33 = n – 1 33 + 1 = n 34 = n n = 34 Hence, there are 34 terms in the given AP

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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