│2y+│y│+10│/│6y+2│y│+5│>1 求Y解
已知│x+2│=10,│y-1│=6且│x-y│=y-x,求x-y的值
已知(3X-2Y+1)的平方+│4X-3Y-3│=0,求X,Y
(2x-y+7)²+│4x+3y-1│=0 求x的y次方
设全集U={(x,y)│x,y∈R},集合M={(x,y)│y-3/x-2=1},N={(x,y)│y≠x+1},求Cu
已知有理数X,Y满足1/2│X-Y│+┃Y-1/2┃=0,求3X-7Y的值.
1.已知x,y,z满足2│x-y│+(根号2y-z)+z平方-z+(1/4)=0,求x,y,z值.
已知实数x,y满足关系式│x+y-3│+根号(xy-6)=0,求代数式(x+2y)/y-x的值
设集合M={y│-1≤y≤2},N={y│y≥0}全集U=R,求(CuM)交(CuN).
设y=y(x)是方程xˆ2eˆy+yˆ2=1确定函数,求dy/dx│(1,0)
设A={(x,y)│y^2-x-1=0},B={(x,y)│4x^2+2x-2y+5=0},C={(x,y)│ y=kx
1.已知集合A={(X,Y)│2X-Y=0},B={(X,Y)│3X+Y=0},C={(X,Y)│2X-Y=3},求A∩
知│x-3y=6│与(x+2y+1)*(x+2y+1)互为相反数,则x= ,y=