2 câu trả lời
`|x - 1/3| = 1/2`
`TH1`
`x - 1/3 = 1/2`
`x = 1/2 + 1/3`
`x = 3/6 + 2/6`
`x = 5/6`
`TH2`
`x - 1/3 = -1/2`
`x = -1/2 + 1/3`
`x = -3/6 + 2/6`
`x = -1/6`
Đáp án:
$\text{x = }$ $\left\{-\dfrac{1}{6}\:;\:\dfrac{5}{6}\right\}$
Giải thích các bước giải:
$\left|x-\dfrac{1}{3}\right|=\dfrac{1}{2}$
TH1: $x-\dfrac{1}{3}=-\dfrac{1}{2}$
$⇒x=-\dfrac{1}{2}+\dfrac{1}{3}$
$⇒x=-\dfrac{1}{6}$
TH2: $x-\dfrac{1}{3}=\dfrac{1}{2}$
$⇒x=\dfrac{1}{2}+\dfrac{1}{3}$
$⇒x=\dfrac{5}{6}$
$\text{Vậy x = }$ $\left\{-\dfrac{1}{6}\:;\:\dfrac{5}{6}\right\}$
