Bạn tham khảo :
$\left( \dfrac{1}{8} \right)^{100} . 8^{200} - \dfrac{1}{6}$
$= \left(\dfrac{1}{8} \right)^{100} . (8^2)^{100} - \dfrac{1}{6}$
$= \left(\dfrac{1}{8} \right)^{100} . 64^{100} - \dfrac{1}{6}$
$= \left(\dfrac{1}{8} .64\right)^{100} - \dfrac{1}{6}$
$= \left(\dfrac{64}{8} \right)^{100} - \dfrac{1}{6}$
$= 8^{100} - \dfrac{1}{6}$