Practice Test Discussion

What will come in place of question mark (?) in the following questions

${}^{3}{\sqrt{1331}} =?$

[OBC (PO), 2009]

None of these

Explanation

$\begin{array}{l} Here, \\ = {}^{3}{\sqrt{1331}} \\ = {}^{3}{\sqrt{11 \times 11 \times 11}} \\ {= (11}^{3})^{1/3} {= 11}^{3 \times \frac{1}{3}} \\ = 11 \end{array}$

Hence, Option E is correct.

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