1: =>x=1 và y=1
3: =>x-0,2=0 và y+0,1=0 và x+y+z=0
=>x=0,2; y=-0,1; z=-x-y=-0,2+0,1=-0,1
1: =>x=1 và y=1
3: =>x-0,2=0 và y+0,1=0 và x+y+z=0
=>x=0,2; y=-0,1; z=-x-y=-0,2+0,1=-0,1
\(a.\left|x+2\right|+\left|x-1\right|=3-\left(y+2\right)^2\)
\(b.\left|x-5\right|+\left|1-x\right|=\dfrac{12}{\left|y+1\right|+3}\)
\(c.\left|y+3\right|+5=\dfrac{10}{\left(2x-6\right)^2+2}\)
\(d.\left|x-1\right|+\left|3-x\right|=\dfrac{6}{\left|y-3\right|+3}\)
Tìm x bt
|1/2-x|+|1/5-y|+|1/3-z|<=0
|x^3-2x^2|+|x-2|<=0 giúp mik nha , cảm ơn !!
Bài 1.Tìm x
a,/x-2014/ +/x-2015/+ /x-2016/=2
b,/x-1/+/x+3/ = 4
c,/2x+3/ -2/4-x/=5
d,/x+3/+/x+1/=3x
e,/x-1/+ /x-2/+...+/x-100/= 2500
f,/x+1/+/x+2/+...+/x+100/= 605x
Bài 2, Tìm x ,y
a,/x-2006y/=/x-2012/< 0
b,/x-1/<4
c,/x-2011/>2012
d, (3x-1)^2016 +(5y -3)^2018 <0
Bài 4 : Tìm x,y biết :
a)\(3\dfrac{1}{4}-\dfrac{1}{4}\left|x-0,25\right|=\dfrac{1}{4}\)
b)\(\left|x-3\right|=-4\)
c)\(\left|x-\dfrac{1}{2}\right|+1=0\)
d)\(\left|x-\dfrac{1}{5}\right|=\left|\dfrac{3}{4}-2x\right|\)
e)\(\left|x+2\right|3=0\)
f)\(\left|2x-1\right|-\left|x+2\right|=0\)
g)\(\left|x+2\right|+\left|y-1\right|=0\)
h)\(\left|2x\right|+\left|y+\dfrac{1}{4}\right|=0\)
1) Tìm x \(\in\) Q
a) \(2x+\dfrac{5}{2}=\dfrac{7}{2}\)
b) \(\left|5-\dfrac{1}{2}x\right|=\left|\dfrac{-1}{5}\right|\)
2) Tìm x, y, z, biết
\(\left(2x-\dfrac{1}{2}\right)^2+\left(y+\dfrac{1}{2}\right)^2+\left(z-\dfrac{1}{3}\right)^2=0\)
1/ Tìm GTNN:
a,\(\left|7x-5y\right|+\left|2z-3y\right|+\left|xy+yz+xz-2000\right|\)
b,\(\left|3x-7\right|+\left|3x+2\right|+8\)
2/ Tìm x, y:
a, \(\left|x-5\right|+\left|1-x\right|=\dfrac{12}{\left|y+1\right|+3}\)
b,\(\left|y+3\right|+5=\dfrac{10}{\left(2x-6\right)^2+2}\)
c,\(\left|x-1\right|+\left|3-x\right|=\dfrac{6}{\left|y+3\right|+3}\)
Tìm x,y biết :
a ) \(1-\left|x-\dfrac{1}{4}\right|=0,25\)
b)\(\left|x+0,5\right|+2,25=0,5\)
c)\(\left|2x+5\right|=\left|1-x\right|\)
d)\(\left|x-2\right|-0,5=\dfrac{1}{4}\)
e)\(\left|\dfrac{3}{2}-x\right|+2=2\)
f)\(\left|x-3\right|+5=4\)
g)\(\left|\dfrac{1}{2}x-3\right|+\left|y+0,5\right|=0\)
h)\(\left|x+4\right|+\left|1-2y\right|=0\)
giup mình voi mình sap đi học rồi
Tìm x,y,z
a)\(\dfrac{x}{2}=\dfrac{y}{5}\) và xy=90
b) \(\left(x+20\right)^{100}+\left|y+4\right|=0\)
c)\(\dfrac{x}{3}=\dfrac{y}{4};\dfrac{y}{3}=\dfrac{z}{5}\) và \(2x-3y+z=6\)
Bài 3 Tìm x y biết
1) | \(\left|\dfrac{1}{2}-\dfrac{1}{3}+x\right|=-\dfrac{1}{4}-\left|y\right|\)
2)\(\left|x-y\right|+\left|y+\dfrac{9}{25}\right|=0\)