Toán |x+2/3| =1/2-(1/4-2/3) |x-1/5|=|-5/2|-(1/4-2/3) 11/07/2021 By Aaliyah |x+2/3| =1/2-(1/4-2/3) |x-1/5|=|-5/2|-(1/4-2/3)
a)`|x+2/3| =1/2-(1/4-2/3)` ⇒`|x+2/3|=1/2-1/4+2/3=11/12` ⇒`x+2/3=11/12` hoặc `x+2/3=-11/12` ⇒`x=1/4` hoặc `x=-19/12` b) `|x-1/5|=|-5/2|-(1/4-2/3)` ⇒`|x-1/5|=5/2-1/3+2/3=17/6` ⇒`x-1/5=17/6` hoặc `x-1/5=-17/6` ⇒`x=91/30` hoặc `x=-69/80` Trả lời
|x+2/3|=1/2-(1/4-2/3) |x+2/3|=1/2-(-5/12) |x+2/3|=11/12 TH1:x+2/3=11/12⇒x=11/12-2/3⇒x=1/4 TH2:x+2/3=-11/12⇒x=-11/12-2/3⇒x=-19/12 |x-1/5|=|-5/2|-(1/4-2/3) |x-1/5|=5/2-(-5/12) |x-1/5|=5/2-35/12 |x-1/5|=35/12 TH1: x-1/5=35/12⇒x=35/12+1/5⇒x=187/60 TH2: x-1/5=-35/12⇒x=-35/12+1/5⇒x=-163/60 Trả lời
a)`|x+2/3| =1/2-(1/4-2/3)`
⇒`|x+2/3|=1/2-1/4+2/3=11/12`
⇒`x+2/3=11/12` hoặc `x+2/3=-11/12`
⇒`x=1/4` hoặc `x=-19/12`
b) `|x-1/5|=|-5/2|-(1/4-2/3)`
⇒`|x-1/5|=5/2-1/3+2/3=17/6`
⇒`x-1/5=17/6` hoặc `x-1/5=-17/6`
⇒`x=91/30` hoặc `x=-69/80`
|x+2/3|=1/2-(1/4-2/3)
|x+2/3|=1/2-(-5/12)
|x+2/3|=11/12
TH1:x+2/3=11/12⇒x=11/12-2/3⇒x=1/4
TH2:x+2/3=-11/12⇒x=-11/12-2/3⇒x=-19/12
|x-1/5|=|-5/2|-(1/4-2/3)
|x-1/5|=5/2-(-5/12)
|x-1/5|=5/2-35/12
|x-1/5|=35/12
TH1: x-1/5=35/12⇒x=35/12+1/5⇒x=187/60
TH2: x-1/5=-35/12⇒x=-35/12+1/5⇒x=-163/60