|x-1|+|y+3|=0,则y-x-0.5的值是
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(x+y-5)*(x+y-5)+(x-y+3)=0 x*x-y*y
已知:3x-5y=0,求x/y,x-y/y,x-y/x
若x,y满足|2x-y-3|+|3x+2y+1|=0,则x= y=
若x,y满足|x-y+1|+(x+y+3)^2=0则x^2-y^2=
|2x+y+1|+√2y+3x=0则x.y=
若x>1,y>0,且满足 xy=x^y,x/y大于等于x^3y,则y则 最大值求y 的最大值
若2x-3y+4=0则x(x*x-1)+x(5-x*x)-6y+7
RT.若x>1,y>0,且满足xy=x^y,x/y=x^3y,则x+y的值为?
若X>1,Y>0,且满足XY=X的Y次方,X/Y=X的3Y次方,则X+Y等于?
若x>1,y>0,且满足 xy=x^y,x/y大于等于x^3y,则x+y的值为
若y=x(x-1)(x-2)(x-3),则y′(0)=
若3x-5y=0,则x+y/x=(),x-y/y=(),2x-3y/2x+3y=( )
已知2x-y=0,求分式【1+(3*y*y*y/x*x*x-y*y*y)】/【1+(2y/x-y)】的值注:x*x*x-y*y*y=(x-y)*(x*x+xy+y*y)
{4x-3y-10=0 3x-2y=0,{3x-4(x-y)=2 2x-3y=1,{2(x+y)-(x-y)=3 (x+y)-2(x-y)=1
若x-y不等于0,2x-3y=0,则分式(10x-11y)/(x-y)的值是()?(10x-11y)/(x-y) =[(8x-8y)+(2x-3y)]/(x-y) =8为什么8X-8Y=8?(10x-11y)/(x-y)=[(8x-8y)+(2x-3y)]/(x-y)=8+(2x-3y)]/(x-y)=8+0=8
当x、y为有理数,且|x-1|+|3y+x|=0,则x=?y=?
{x+y=1 ,xy=-6{x(2x-3)=0,y=x²-1{(3x+4y-3)(3x+4y+3)=0,3x+2y=5{(x-y+2)(x+y)=0,x²+y²=8{(x+y)((x+y-1)=0,(x-y)(x-y-1)=0
若根号x+y-1+(y+3)^2=0,则x+y的平方根是?