Question

\(\left(-\dfrac{1}{3}\right)\)² : x = \(\left(\dfrac{1}{3}\right)\)⁴

Answer 1

`(-1/3)^2:x=(1/3)^4`

`<=>x=(-1/3)^2:(1/3)^4`

`<=>x=(1/3)^2:(1/3)^4`

`<=>x=1/9:1/81=9`

Vậy `x=9`

Answer 2

\(\left(-\dfrac{1}{3}\right)^2:x=\left(\dfrac{1}{3}\right)^4\\ \left(\dfrac{1}{3}\right)^2:x=\left(\dfrac{1}{3}\right)^4\\x=\left(\dfrac{1}{3}\right) ^2:\left(\dfrac{1}{3}\right)^4\\ x=\left(\dfrac{1}{3}\right)^{2-4}\\ x=\left(\dfrac{1}{3}\right)^{-2}\\ x=3^2\\ x=9\)

Answer 3

\(\left(-\dfrac{1}{3}\right)^2:x=\left(\dfrac{1}{3}\right)^4\Leftrightarrow x=\left(\dfrac{1}{3}\right)^2:\left(\dfrac{1}{3}\right)^4=\dfrac{1}{\left(\dfrac{1}{3}\right)^2}=\dfrac{1}{\dfrac{1}{9}}=9\)