Which expression should be multiplied to both the numerator and the denominator of so…

MATHEMATICS · Single correct · GCSE · Mathematics · Number · Number

Problem

Which expression should be multiplied to both the numerator and the denominator of

\dfrac{3}{\sqrt[3]{7}}

so that the denominator becomes a rational number? (a)

\sqrt[3]{7}

(b)

\sqrt[3]{7^{2}}

(c)

7\sqrt[3]{7}

(d)

\sqrt[3]{7^{3}}