求y=(x^2-3x+3)/(x-2） x大于2的最小值

已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y) 若2/x-1/y=3,求[y/x-y/x-y(x-y/x-x+y)]/x-2y/x的值 (x-y)/(x+y)=3求( 3x-2y-1)/(x+y-5) 已知|x|=2,|y|=3,|x+y|=-(x+y)求x-y y=3(x-y),x=2(x-y)求x,y的值 已知（x+y）2 =2,(x-y)3 =3,求(x+y)7(x-y)2(x+y)3(y-x)4 的值 已知x-y=3,求[（x+y)(x-y)-(x-y)^2+2y(x-y)]除以的值 已知3x =2y 求x/x+y+y/x-y-y²/x²-y² x+y分之x-y=-2,求3（x+y)分之x-y减去x-y分之2（x+y）的值 若x-y分之x+y=3,求式子x+y分之5(x-y)—2（x-y）分之x+y的值 y=(2x*x-2x+3)/(x*x-x+1),求值域? 求值域 1,y=(x+2)/(x*x+3x+6) 2,y=3x/(x*x+4) x+y/2+ x-y/2=6 2(x+y)-3x+3y=24 求X Y 已知2y-x=-3,求[4y(2x-y)-2x(2x-y)]/(2x-y {(x+y)/2+(x-y)/3=1,(x+y)-5(x-y)=2.求x=?,y=? 已知x=3分之1,y=二分之一,求代数式x-(x+y）+（x+2y)-(x+3y)+...-(x+13y)的值 已知x/y=2/3,求x²-y²/xy÷[（x+y）（x-y/x）³]÷x/y²的值 求y=x^-4x+3/2x^-x-1的值域y=（x^2-4x+3）/（2x^2-x-1）