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Evaluate:
(i) \( \sqrt[3]{36} \times \sqrt[3]{384} \)
(ii) \( \sqrt[3]{96} \times \sqrt[3]{144} \)
(iii) \( \sqrt[3]{100} \times \sqrt[3]{270} \)
(iv) \( \sqrt[3]{121} \times \sqrt[3]{297} \)
To find:
We have to evaluate the given expessions.
Solution:
(i) $\sqrt[3]{36} \times \sqrt[3]{384}=\sqrt[3]{36 \times 384}$
$=\sqrt[3]{2 \times 2 \times 3 \times 3 \times 2 \times 2 \times 2 \times 2 \times 2 \times 2 \times 2 \times 3}$
$=\sqrt[3]{3 \times 3 \times 3 \times 2 \times 2 \times 2 \times 2 \times 2 \times 2 \times 2 \times 2 \times 2}$
$=\sqrt[3]{3^{3} \times 2^{3} \times 2^{3} \times 2^{3}}$
$=3 \times 2 \times 2 \times 2$
$=24$
(ii) $\sqrt[3]{96} \times \sqrt[3]{144}=\sqrt[3]{96 \times 144}$
$=\sqrt[3]{2 \times 2 \times 2 \times 2 \times 2 \times 3 \times 2 \times 2 \times 2 \times 2 \times 3 \times 3}$
$=\sqrt[3]{2 \times 2 \times 2 \times 2 \times 2 \times 2 \times 2 \times 2 \times 2 \times 3 \times 3 \times 3}$
$=\sqrt[3]{2^{3} \times 2^{3} \times 2^{3} \times 3^{3}}$
$=2 \times 2 \times 2 \times 3$
$=24$
(iii) $\sqrt[3]{100} \times \sqrt[3]{270}=\sqrt[3]{100 \times 270}$
$=\sqrt[3]{27000}$
$=\sqrt[3]{1000 \times 27}$
$=\sqrt[3]{10 \times 10 \times 10 \times 3 \times 3 \times 3}$
$=\sqrt[3]{10^{3} \times 3^{3}}$
$=10 \times 3$
$=30$
(iv) $\sqrt[3]{121} \times \sqrt[3]{297}=\sqrt[3]{121 \times 297}$
$=\sqrt[3]{11 \times 11 \times 11 \times 3 \times 3 \times 3}$
$=\sqrt[3]{(11)^{3} \times(3)^{3}}$
$=11 \times 3$
$=33$