Question 1. Classify the following numbers as rational or irrational: Chapter 1: Number System Maths Class 9 solutions are developed for assisting understudies with working on their score and increase knowledge of the subjects. Question 1. Classify the following numbers as rational or irrational: is solved by our expert teachers. You can get ncert solutions and notes for class 9 chapter 1 absolutely free. NCERT Solutions for class 9 Maths Chapter 1: Number System is very essencial for getting good marks in CBSE Board examinations
Question 1. Classify the following numbers as rational or irrational:
Solution: (i)2 - √5
Here 2 is a rational number and √5 is a irrational number
And difference of rational and irrational is always a irrational number
So that 2 - √5 is a irrational number
(ii) (3 + √23) - √23
Solve the bracket we get
3 + √23 - √23 = 3
and 3 is a rational number so that (3 + √23) - √23 is a rational number
(iii) and 2/7 can be written in form of p/q so it a rational number
(iv) 1/ √2 is an irrational number because 1 is rational and √2 is irrational and product or division of rational with irrational is always irrational
(v) 2pi it is an irrational here 2 is rational and pi is a irrational number and product or division of rational with irrational is always irrational
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