Which of the following is irrational-a 49b 45c 7d 81

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Irrational Numbers

Which of the ...

Question

Which of the following is irrational?

(a) $\sqrt{\frac{4}{9}}$

(b) $\sqrt{\frac{4}{5}}$

(c) $\sqrt{7}$

(d) $\sqrt{81}$

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\sqrt{\frac{4}{9}}

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