\(\frac{x}{2}=\frac{y}{3}=\frac{z}{4}=\frac{x+2y-3z}{2+2.3-3.4}=\frac{30}{-4}=-\frac{15}{2}\)
x=-15/2.2=-15
y=-15/2.3=-5/2
z=-15/2.4=-30
\(\frac{x}{2}=\frac{y}{3}=\frac{z}{4}=\frac{x+2y-3z}{2+2.3-3.4}=\frac{30}{-4}=-\frac{15}{2}\)
x=-15/2.2=-15
y=-15/2.3=-5/2
z=-15/2.4=-30
Tim x, y, z biet x, y, z > 0 , x-y/z = y-z/x = z-x/y va x+2y+3z=30
tim x y z x/2=y/3 y/4=z/5 va x^2-y^2=16
3x/8=3y/6y=3z/216 va 2x^2+2y^2-z^2=1
a) Tìm 3 số x,y,z biết x:y:z=2:4:6 va 3x-y+z=24
b) Tim 3 số x,y,z biết x,y,z tỉ lệ nghịch 6,10,4 và x+2y-3z=115
1, Tim x,y,z
e, \(\frac{x-1}{2}=\frac{y-2}{3}=\frac{z-3}{4}\) va x - 2y + 3z =14
h,\(\frac{x}{2}=\frac{y}{3}\) va x . y = 54
tim x y z biet x-1/2=y-2/3=z-3/4 biet x-2y+3z=14
b2:tìm x,y,z
a) x/3=y/4=z/5 va 2x+3y+5z=86
b) x/3=y/4; y/6=z/8 va 3x-2y-z=13
c) x/2=y'3=z/4 va xy+yz+zx=104
b3:tìm x,y,z
a)x/3=y/7=z/2 va 2x^2 +y^2 +3z^2=316
b)x:y:z=2:5:7 va 3x+2y-z=27
cho x,y,z thoa man x/2=2y/3=3z/4 va x-y=15. khi do x-y-z la
biet x;y;z thoa man: (x-1)/2 = (y-2)/3 = (z-3)/4 va x-2y+3z = -10
khi do x+y+z = ?
Biết x ;y;z thỏa mãnx-1/2=y-2/3=z-3/4 va x-2y+3z=-10
Khi do x;y;z =?