Ex 1.4, 1 - Chapter 1 Class 10 Real Numbers - Part 19

Ex 1.4, 1 - Chapter 1 Class 10 Real Numbers - Part 20

  1. Chapter 1 Class 10 Real Numbers (Term 1)
  2. Serial order wise

Transcript

Ex 1.4 , 1 Without actually performing the long division, state whether the following rational numbers will have a terminating decimal expansion or a non-terminating repeating decimal expansion: (x) 77/210 77/210 = 11/30 ๐‘/๐‘ž is terminating if (i) p & q are co-prime and (ii) q is of the form 2n 5m where n & m are non-negative integers Checking co-prime 11 & 30 have no common factors, So, 11 & 30 are co-prime For Denominator (30) Denominator = 30 = 2 ร— 3 ร— 5 So , denominator is not of the form 2n 5m Thus, 11/30 i.e. 77/210 is a non-terminating repeating decimal

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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.