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The following real number have decimal expansions as given below. In the following case, decide whether it is rational or not. If it is rational, and of the form p /q what can you say - Mathematics

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The following real number have decimal expansions as given below. In the following case, decide whether it is  rational or not. If it is rational, and of the form p/q what can you say about the prime factors of q?

43.123456789

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Solution

43.123456789

It is a rational number and q will have factors of 2 and 5 only.

Concept: Revisiting Rational Numbers and Their Decimal Expansions
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APPEARS IN

NCERT Class 10 Maths
Chapter 1 Real Numbers
Exercise 1.4 | Q 3. (i) | Page 18

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