2yoututu11
Which is a rational number?
A.
B.
C.
D.



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2yoututu11
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\[A. \sqrt{8}\]

anonymous
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nope, \[\sqrt{8}=2\sqrt{2}\] and \[\sqrt{2}\]is irrational

2yoututu11
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\[B. \sqrt{16}\]

anonymous
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in fact \(\sqrt{a}\) is always irrational UNLESS \(a\) is a perfect square,
like for example 16

2yoututu11
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\[C.\sqrt{18}\]

2yoututu11
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\[D.\sqrt{20}\]

BriannaD
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16 i believe

2yoututu11
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thank you

BriannaD
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wellcome~