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Classify the following number as rational or irrational with justification: 1275 - Mathematics

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Question

Classify the following number as rational or irrational with justification:

`sqrt(12)/sqrt(75)`

Sum

Solution

The given number is rational number.

Justification: `sqrt(12/17) = sqrt((3 xx 4)/(3 xx 25))`  ...(Simplifying the given expression)

= `sqrt(4/25)`  ...(Taking the square root)

= `2/5` 

Which is in form `p/q; q ≠ 0, p, q` both are integers.

Thus, `sqrt(12/75)` is rational.

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Chapter 1: Number Systems - Exercise 1.2 [Page 7]

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NCERT Exemplar Mathematics [English] Class 9
Chapter 1 Number Systems
Exercise 1.2 | Q 4. (vi) | Page 7

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