2017-II-02

16-06-2021 app.cch No Comments

Ans: D

\begin{array}{cl} (\frac{1}{9^{555}}) 3^{444} \\ = & (\frac{1}{(3^{2})^{555}}) 3^{444} \\ = & \frac{1}{3^{2 \times 555 - 444}} \\ = & \frac{1}{3^{666}} \end{array}

2017, HKDSE-MATH, Paper 2 Laws of Indices