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Ex 5.2, 14 - Chapter 5 Class 10 Arithmetic Progressions (Term 2)
Last updated at Aug. 3, 2021 by Teachoo
Transcript
Ex 5.2, 14 How many multiples of 4 lie between 10 and 250? Multiple of 4 are 4, 8, 12, 16, …. For Lowest multiple 10/4 = 22/4 11/4 = 23/4 12/4 = 3 ∴ Lowest multiple = 12 For highest multiples 250/4 = 622/4 249/4 = 621/4 248/4 = 62 ∴ Highest multiple = 248 So the series is 12, 16, 20, … 248 Since difference is same, it is an AP Here, a = 12 , d = 4 Last term = an = 248 We need to find n an = a + (n – 1) d 248 = 12 + (n – 1) 4 248 = 12 + n (4) – 1 × 4 248 = 12 + 4n – 4 248 – 12 + 4 = 4n 236 + 4 = 4n 240 = 4n n = 240/4 n = 60 So, 60 multiples of 4 lie between 10 and 250
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Ex 5.2
Ex 5.2, 1
Ex 5.2, 2 (i) (MCQ)
Ex 5.2, 2 (ii) (MCQ) Important
Ex 5.2, 3 (i)
Ex 5.2, 3 (ii)
Ex 5.2, 3 (iii) Important
Ex 5.2, 3 (iv)
Ex 5.2, 3 (v) Important
Ex 5.2, 4
Ex 5.2, 5 (i)
Ex 5.2, 5 (ii) Important
Ex 5.2, 6 Important
Ex 5.2, 7
Ex 5.2, 8
Ex 5.2, 9
Ex 5.2, 10
Ex 5.2, 11
Ex 5.2, 12 Important
Ex 5.2, 13 Important
Ex 5.2, 14 Important You are here
Ex 5.2, 15
Ex 5.2, 16
Ex 5.2, 17 Important
Ex 5.2, 18
Ex 5.2, 19
Ex 5.2, 20 Important
Chapter 5 Class 10 Arithmetic Progressions (Term 2)
Serial order wise
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Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 10 years. He provides courses for Maths and Science at Teachoo.