\(9x=42\Rightarrow x=\dfrac{14}{3}\\ \dfrac{x}{2}=\dfrac{y}{3}\Rightarrow y=\dfrac{3x}{2}=\dfrac{14}{2}=7\\ x^3+y^3+z^3=-1009\\ \Rightarrow\dfrac{2744}{27}+343+z^3=-1009\\ \Rightarrow z^3=-\dfrac{39248}{27}\Rightarrow z=-\dfrac{\sqrt[3]{39428}}{3}\)
\(9x=42\Rightarrow x=\dfrac{14}{3}\\ \dfrac{x}{2}=\dfrac{y}{3}\Rightarrow y=\dfrac{3x}{2}=\dfrac{14}{2}=7\\ x^3+y^3+z^3=-1009\\ \Rightarrow\dfrac{2744}{27}+343+z^3=-1009\\ \Rightarrow z^3=-\dfrac{39248}{27}\Rightarrow z=-\dfrac{\sqrt[3]{39428}}{3}\)
Tìm x,y,z.
a) x/3=y/4=z/5 và x+y+z=52
b) x/3=y/5=z/7 và 2x-y+3z=110
3.Tìm x,y,z :
\(\dfrac{x}{z+y+1}=\dfrac{y}{x+z+1}=\dfrac{z}{x+y-2}=x+y+z\)
\(\frac{x^3}{8}=\frac{y^3}{64}=\frac{z^3}{216}\) và \(x^2+y^2+z^2=14\)
x-1/2= y- 2/3= z- 3/ 4vaf 2x+ 3y+ z= 49
Tìm x biết : |x|+|x+1|+|x+2|+|x+3|+|x+4|+.......+|x+2016|+|x+2017|=1009^2
1. Tìm x
a) \(|x-3|+|2x-6|=8\)
b) \(|3x-2|-|6-9x|=-|-16|\)
2. Tìm x, y
a)\(|x|+|x+2|=0\)
b)\(|\dfrac{1}{2}-\dfrac{1}{6}+x|=\dfrac{-2}{5}-|-y|\)
\(\frac{x^3}{8}=\) y mũ 3 phần 64=\(\frac{z^3}{216}\)
Tìm x;y biết x(x - y) = \(\dfrac{3}{10}\) và y(x - y) = \(\dfrac{-3}{50}\)
Tìm x;y biết:
x(x - y) = \(\dfrac{3}{10}\) và y(x - y) = \(\dfrac{-3}{10}\)