求y=x^(1/3) * (1-x)^（2/3）的极值

(x-y)/(x+y)=3求( 3x-2y-1)/(x+y-5) 若2/x-1/y=3,求[y/x-y/x-y(x-y/x-x+y)]/x-2y/x的值 {(x+y)/2+(x-y)/3=1,(x+y)-5(x-y)=2.求x=?,y=? 若(-x+6):(x-y):(4x+y)=3:14:1,求x+y 若(-x+6):(x-y):(4x+y)=3:14:1,求x+y (-x+6):(x-y);(4x+y)=3;14:1,求x+y的值. 求值域 y=|x-1|-|3+x| 求值域y=|x-1|-|3+x| 已知x(x-1)-(x²+y)=3 求x(x-y)+(y-x)的值 求y=x（1-3x） (x y=(X+1)(X+2)(X+3)求导数 y=(2x*x-2x+3)/(x*x-x+1),求值域? 已知：2x+y=6,x-3y=1 求7y(x-3y)(x-3y)-2(3y-x)(3y-x) 求值域 1,y=(x+2)/(x*x+3x+6) 2,y=3x/(x*x+4) 已知x-y=1,求[(x+2y)²+(2x+y)(x-4y)-3(x+y)(x-y)]÷y的值 已知x-y=1,求[(x+2y)^2+(2x+y)(x-4y)-3(x+y)(x-y)]除以y的值大神们帮帮忙 x*y=6x-y=1求X Y是多少?X=3 Y=2 求公式! 求导数y=3x-x^2 求y',y'/ x=1 y'/x=0 1奥数题x-2y/x+2y=3,求x-2y/3(x+2y)-3(x-2y)/x-2y的差