cho x,y,z la cac so thuc duong thoa man x+y+z=1 tim  min A=x^3/(x^2+xy+y^2)+y^3/(y^2+yz+z^2)+z^3/(z^2+zx+x^2)

tim cac so m,n,p thoa man : m+n+p+8=2canm-1 + 4cann-2 +6canp-3

tim cac so x,y,z thoa man :canx+cany-1 +canz-2 = 1/2(x+y+z)

tim cac so x,y,z thoa man :x+y+z+4=2canx-2 +4cany-3+6canz-5

cho cac so x,y,z thoa man( x-1)/2=(y-2)/3=(z-3)/4 va 2x +3y-z=95 khi do x+y+z =

ai nhanh minh tich

tim cac so nguyen nuyen duong x,y,z biet rang :

x^3-y^3 -z^3 =3xyz va x^2 =2(y+z)

Tim cac so nguyên x,y,z biet

x+y=2,y+z=3,x+z=-5

Cho 3 so x, y, z thoa man cac he thuc: \(\left(z-1\right)x-y=1\) va \(x+zy=2\)

Chmr: \(\left(2x-y\right)\left(z^2-z+1\right)=7\) va tim tat ca cac so nguyen x, y, z thoa man cac he thuc tren.

cho x,y,z la cac so thuc tm (x-1)^2+(y+2)^2+(z-3)^2 =1 cmr |2x-3y+4z+20|<=29

tim cac so huu ti x,y,z biet x+y=1/2 y+z=1/3 z+y=1/4

1.   tim cac cap so nguyen duong (x, y) sao cho:

2 x³ + xy = 11

2.   tim cac cap so nguyen duong (x, y, z)sao cho:

x + y + z = x*y*z

3.   tim x thuoc z, biet;

|x| = -2003

|x| = |-2003|

minh dang can gap lam. chieu mai phai nop rui