x[x-1]-[x^2-y]=2,3x^2加3y^2/2-3xy等于多少
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![x[x-1]-[x^2-y]=2,3x^2加3y^2/2-3xy等于多少](/uploads/image/z/385516-28-6.jpg?t=x%5Bx-1%5D-%5Bx%5E2-y%5D%3D2%2C3x%5E2%E5%8A%A03y%5E2%2F2-3xy%E7%AD%89%E4%BA%8E%E5%A4%9A%E5%B0%91)
x[x-1]-[x^2-y]=2,3x^2加3y^2/2-3xy等于多少
x[x-1]-[x^2-y]=2,3x^2加3y^2/2-3xy等于多少
x[x-1]-[x^2-y]=2,3x^2加3y^2/2-3xy等于多少
x[x-1]-[x^2-y]=2
x^2-x-x^2+y=2
y-x=2
x-y=-2
(3x^2+3y^2)/2-3xy
=(3x^2+3y^2-6xy)/2
=3(x-y)^2/2
=3*(-2)^2/2
=6
函数,y=3x/(x^2+x+1) ,x
函数y=3x/(x^2+x+1) (x
化简 3x(x^2-x-1)-(x+1)(3x^-x) X^3(x-y)+x(y-x)
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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
(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
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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
x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2
计算:1-2x+x^2/x-x^3*xy+x^2y/x-x^2
[2/3x-2/x+y(x+y/3x-x-y)]/x-y/x