MCQ
When simplified $\Big(-\frac{1}{27}\Big)^{-\frac{2}{3}}$ is:
  • $9$
  • B
    $-9$
  • C
    $\frac{1}{9}$
  • D
    $\frac{1}{9}$

Answer

Correct option: A.
$9$
We have to find the value of $\Big(-\frac{1}{27}\Big)^{\frac{-2}{3}}$So,
$\Big(-\frac{1}{27}\Big)^{\frac{-2}{3}}=\Big(-\frac{1}{27}\Big)^{\frac{-2}{3}}$
$=\Big(-\frac{1}{3^3}\Big)^{\frac{-2}{3}}$
$=-\frac{1}{3^{3\times\frac{-2}{3}}}$
$\Big(-\frac{1}{27}\Big)^{\frac{-2}{3}}=-\frac{1}{3^{-2}}$
$=-\frac{1}{\frac{1}{3^2}}$
$=\frac{1}{\frac{1}{9}}$
$=9$
Hence the correct choice is a.

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