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Which of the following is irrational? (a...

Which of the following is irrational?
(a)`0. 14`
(b) `0. 14 bar(16) `
(c)`0. bar(1416) `
(d) `0. 1014001400014. .`

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The answer is D.
An irrational number is non-terminating non-recurring which is `0.4001400014…..`Here, `0.14` is terminating.
`0.14bar(16)', '0. bar(1416)' `are non -terminating recurring.
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