Question

Viết số\(\dfrac{16}{81}\) dưới dạng một lũy thừa, ví dụ \(\dfrac{16}{81}=\left(\dfrac{4}{9}\right)^2\). Hãy tìm cách viết khác

Answer 1

\(\dfrac{16}{81}=\left(\dfrac{2}{3}\right)^4\)

Answer 2

\(\dfrac{16}{81}=\left(-\dfrac{4}{9}\right)^2\)

Answer 3

\(\dfrac{16}{81}=\left(\dfrac{2}{3}\right)^4\)

Answer 4

\(\Rightarrow\left[{}\begin{matrix}\dfrac{16}{81}=\left(\dfrac{-4}{9}\right)^2\\\dfrac{16}{81}=\left(\dfrac{-2}{3}\right)^4\\\dfrac{16}{81}=\left(\dfrac{2}{3}\right)^4\end{matrix}\right.\)

Answer 5

16/81 = ( 2/3 )⁴