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Question
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.bar(123456789)`
Sum
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Solution
`43.bar(123456789)`
It is rational number, as it is non-terminating but repeating. The factors of q will be, apart from 2 and 5, some other factor also.
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Chapter 1: Real Numbers - Exercise 1.4 [Page 18]
