tìm gtnn cua bieu thuc A=(x-y)^4+(y-z)^4+(z-x)^4 với 1<=x,y,z<=2
Cho x,y,z khac o va x-y-z=0.Tinh gia tri cua bieu thuc A=(1-z/x)(1-x/y)(1+y/Z)
Tim gia trin nho nhat cua x+y+z biet
1/x+1/y+1/z=7/10
cho x,y,z la cac so huu ti duong thoa man x+1/yz y +1/xz z+1/xy la cac so nguyen tim gia tri lon nhat cua bieu thuc A=x+y^2+z^3
Cho x,y,z khác 0 và x-y-z=0 . tinh gia tri cua bieu thuc \(\left(1-\frac{z}{x}\right)\left(1-\frac{x}{y}\right)\left(1+\frac{y}{z}\right)\)
tim x;y;z sao cho : x/(y+z+1)=y/(z+x+1)=z/(x+y-2)=x+y+z
tim x ; y ; z biet |x+y-2,8|+ |y+z+4|+ |z+x-1/4|=0
bai 1:Tim x,y,z \(\varepsilon\)Z ,sao cho :|x-y|+|y-z|+|z-x|+|z-t|+|t-x|=2003
bai 2:Cho bieu thuc:E=\(\frac{5-x}{x-2}\)tim gia tri nguyen cua x de
a) E co gia tri nguyen
b)E co gia tri nho nhat
tim x;y;z;x va x;y;z khac 0 biet
(x.y-1)/y=(y.z-1)/z=(x.z-1)/x=1
