Question

(x-1/3)mũ 3=-8/27

Answer 1

`#3107.101107`

`(x - 1/3)^3 = -8/27`

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

`=> x - 1/3 = -2/3`

`=> x = -2/3 + 1/3`

`=> x = -1/3`

Vậy, `x = -1/3.`

Answer 2

\(\left(\dfrac{x-1}{3}\right)^3=-\dfrac{8}{27}\)

\(\Rightarrow\left(\dfrac{x-1}{3}\right)^3=\left(\dfrac{-2}{3}\right)^3\)

\(\Rightarrow\dfrac{x-1}{3}=\dfrac{-2}{3}\)

\(\Rightarrow x-1=-2\)

\(\Rightarrow x=-2+1\)

\(\Rightarrow x=-1\)

Vậy $x=-1$.