Giải pt:|3x-2|=x+1 M.n ơi giúp mình vs:)) 22/10/2021 Bởi Mary Giải pt:|3x-2|=x+1 M.n ơi giúp mình vs:))
|3x-2|=x+1 (1) * Nếu 3x-2 ≥ 0 => x ≥ $\frac{2}{3}$ (1) => 3x-2 =x+1 <=> 3x -x = 1 + 2 <=> 2x = 3 <=> x = $\frac{3}{2}$ (TM) * Nếu 3x -2 <0 => x < $\frac{2}{3}$ (1) => -3x+2 = x+1 <=> -3x-x= 1 -2 <=> -4x = -1 <=> x = $\frac{1}{4}$ (TM) Vậy S = { $\frac{3}{2}$ , $\frac{1}{4}$ } #number one #Trang Huyen Bình luận
TH1: `3x-2 \ge 0 <=> x \ge 2/3` `3x-2=x+1` `<=>2x=3` `<=>x=3/2 (TM)` TH2 : `3x-2 < 0 <=> x < 2/3` `-(3x-2)=x+1` `<=>-3x+2=x+1` `<=>-4x = -1` `<=>x=1/4(TM)` Bình luận
|3x-2|=x+1 (1)
* Nếu 3x-2 ≥ 0
=> x ≥ $\frac{2}{3}$
(1) => 3x-2 =x+1
<=> 3x -x = 1 + 2
<=> 2x = 3
<=> x = $\frac{3}{2}$ (TM)
* Nếu 3x -2 <0
=> x < $\frac{2}{3}$
(1) => -3x+2 = x+1
<=> -3x-x= 1 -2
<=> -4x = -1
<=> x = $\frac{1}{4}$ (TM)
Vậy S = { $\frac{3}{2}$ , $\frac{1}{4}$ }
#number one
#Trang Huyen
TH1: `3x-2 \ge 0 <=> x \ge 2/3`
`3x-2=x+1`
`<=>2x=3`
`<=>x=3/2 (TM)`
TH2 : `3x-2 < 0 <=> x < 2/3`
`-(3x-2)=x+1`
`<=>-3x+2=x+1`
`<=>-4x = -1`
`<=>x=1/4(TM)`