若实数x,y满足1/x-1/y=5,则分式3x-2xy-3y/x+xy-y的值等于?
若实数x,y满足1/x-1/y=5,则分式3x-2xy-3y/x+xy-y的值等于?
实数X,Y满足X大于等于Y大于等于1和2X平方-xy-5x+y+4=o,则x+y的值
若实数x,y满足x·x+xy+y=14,y·y+xy+x=28.则x+y的值等于
若实数x,y满足x+y+(x-y)i=2,则xy的值等于
若实数xy满足(x+y+2)(x+y-1)=0,则x+y的值是
若(y-x)/xy=3,求分式(2x+3xy-2y)/(x-2xy-y)的值
若实数XY满足约束条件X大于等于0,Y大于等于0,X+Y小于等于1,则Z=3X+Y的最大值为
已知实数x,y满足5x^2-3xy+1\2y^2-2x+1\2y+1\4=0,求x,y的值
已知实数x、y满足5x²-3xy+1/2y²-2x+1/2y+1/4=0 求x、y的值
已知1/x+1/y=3,求分式3x-2xy+3y/x+xy+y的值
1/x+1/y=3.求分式3x-2xy+3y/x+xy+y的值
已知,1/x+1/y=5.,求分式3x+xy+3y/x-2xy+y的值