cho x,y,z khác 0
tinh gt bt b=(1-z/x)*(1-x/y)*(1+y/z)
biết x-y-z=0
tim cac so x,y,z biet x -1 phan 2 bang y cong 3 phan 4 bang z-5 phan 6 va 5z - 5x - 4y bang 50
tinh x,y,z biet rang x/y+z+1=y/z+x+1=z/x+y-2=x+y+z
Cho 3 số x;y;z khác 0 thỏa mãn\(\frac{y+z-x}{x}=\frac{z+x-y}{y}=\frac{x+y-z}{z}\)Hãy tính gt của bt B=\(\left(1+\frac{x}{y}\right)\left(1+\frac{y}{z}\right)\left(1+\frac{z}{x}\right)\)
Tim x, y, z biet
a ) |x-3,5|+ |x+5|=0
b) |x-1| + (y+1)^2 + |z-1|=0
c) ( x-1/3)^2 + (y-2)^2+ (z-1)^2 be hon hoac bang 0
d)(x-z)^2+ (y+x)^2 + (z+1/4)^2 =0
Cac ban giup minh voi minh can gap lam
tim x;y;z biet x(x+y+z)=2; y(x+y+z)=25; z(x+y+z)=-2; x>0
cho : y+z-x phan x= z+x-y phan y= x+y-z phan z
tính (1+x phan y).(1+y phan z).(1+z phan x)
cho:x phan 2=y phan 3= z phan 5 va x×y×z=810 tinh x+y+z
Cho x, y, z thoa man
x/2= y/5= z/7(y, x, z khac 0)
Tinh
P=(x-y+z)/(x-y*z-2)
