Y=X^12*(3X(1-X)^2)^2 *(1-X)^3 *3X^2(1-X) ,求Y的导数等于0时候的解X
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函数,y=3x/(x^2+x+1) ,x
函数y=3x/(x^2+x+1) (x
若2/x-1/y=3,求[y/x-y/x-y(x-y/x-x+y)]/x-2y/x的值
先化简再求值; 解方程组 x(x-y)-y(x+y)+2xy 其中x=2 ,y=-22.x[x-x(x-1)],其中x=-2解方程组4x+3y=12x-y=32.y+1=2x 4x-y=2 3.2x+2y=0 2x-y+24=0
化简 3x(x^2-x-1)-(x+1)(3x^-x) X^3(x-y)+x(y-x)
(3x-y)^2+(3x+y)(3x-y),x=1,y=-2
二元一次方程 :2(x+y)-(x-y)=3 (x+y)-2(x-y)=1
(x-y)/(x+y)=3求( 3x-2y-1)/(x+y-5)
2(x+y)-3(x-y)=1 6(x+y)+(x-y)=51
{3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1
变量x,y满足约束条件,x+y>=3,x-y>=-1,2x-y
(x-y)^2+(x+y)(x-y) 其中 X =3 Y=-1
3^x+2x=y,x
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)
若2x-3y+4=0则x(x*x-1)+x(5-x*x)-6y+7
x^3+x-30(分解因式);x^12-y^12;x^15+x^14+x^13.x^2+x+1
x+y+2(-x-y+1)=3(1-y-x)-4-(y+x-1),x+y=?