已知实数x,y满足(x+y)(x+y+3)-4=0则x+y的值是
已知实数x,y满足x^2+y^2-6x-8y+24=0,则3x+4y-10的取值范围是
已知实数x,y满足|x|+x+y=10、x+|y|-y=12,则x+y的值?
已知实数x,y满足条件x≥0,y≥x,3x+4y≤12,则(x+2y+3)/(x +1)的最大值是
实数X.Y满足X*X+Y*Y-2X-2Y+1=0,则(Y-4)/(X-2)的取值范围是?
已知实数xy满足x/y=x-y,且y>1,则实数x的取值范围是
已知实数x,y,满足x-√x-1=√y+3-y,则x+y最大值是?
已知实数x,y满足{x≧0 y≧x 4x+3y≦12}.z=2y+3/x+1 的取值范围
已知实数x满足x^2+2xy+y^2-(x+y)-6=0则x+y的值
已知实数想x.y满足x²+3x+y-3=0 则x+y的最大值为
若实数X,Y满足X^2+3Y^2-12Y+12=0,则Y的值是?
已知实数x,y满足4x+3y-12=0,则a=x^2+y^2的取值范围是
已知实数x满足x+1/x=3,求x-1/x的值 如果x平方+y平方-4x-2y+5=0,则(根号x)+y/(根号x)-y