Question

viêt mỗi số \(\dfrac{81}{125}\); \(\dfrac{-8}{27}\)dưới dạng một lũy thừa

Answer 1

\(\dfrac{81}{125}=\dfrac{3^4}{5^3}\)

\(\dfrac{-8}{27}=\dfrac{\left(-2\right)^3}{3^3}=\left(\dfrac{-2}{3}\right)^3\)

Answer 2

Ta có:

\(\dfrac{81}{125}=\dfrac{3^4}{5^4}=\left(\dfrac{3}{5}\right)^4\)

\(-\dfrac{8}{27}=-\dfrac{2^3}{3^3}=\left(-\dfrac{2}{3}\right)^3\)

Answer 3

\(\dfrac{81}{125}=\dfrac{3^4}{5^4}=\left(\dfrac{3}{5}\right)^4\)

\(\dfrac{-8}{27}=\dfrac{\left(-2\right)^3}{3^3}=\left(\dfrac{-2}{3}\right)^3\)

Chúc bạn học tốt!