已知实数xy满足y≥1y≤2x－1x＋y≤8

已知实数x,y满足2x-y≥0x≤1x+y+1≥0则z=x^2-2xy+y^2已知实数x,y满足2x-y≥0x≤1x+y+1≥0则z=x^2-2xy+y^2的最大值已知实数x,y满足2x-y≥0x≤1

已知实数xy满足x+2y已知实数xy满足x+2y已知实数xy满足x+2yz=3x+y=13(x+2y)/6+5(x-4y)/6当x=5,y=2时取到,z最大值17

已知实数xy满足x+y-2已知实数xy满足x+y-2已知实数xy满足x+y-2本题作为选择题,画个图就很明确了.三个不等式确定的x、y的范围是三直线y=-x+2,y=x,x=-3围成的三角形区域.令x

已知实数x、y满足xy>0,且8/xy+1/x+1/y=1,已知实数x、y满足xy>0,且8/xy+1/x+1/y=1,已知实数x、y满足xy>0,且8/xy+1/x+1/y=1,

已知实数X,Y满足根号2X-Y-8+根号X+2y+1=0,求XY.已知实数X,Y满足根号2X-Y-8+根号X+2y+1=0,求XY.已知实数X,Y满足根号2X-Y-8+根号X+2y+1=0,求XY.根

已知实数x,y满足x²+y²-xy+2x-y+1=0求xy已知实数x,y满足x²+y²-xy+2x-y+1=0求xy已知实数x,y满足x²+y

设实数xy满足y≥x＋12y-4x-1≤02y＋x－11≤0,设实数xy满足y≥x＋12y-4x-1≤02y＋x－11≤0,则y²/x的取值范围设实数xy满足y≥x＋12y-4x-1≤02y

已知x,y均为实数,且满足x(y+1)+y=8,x^2y+xy^2=12,则x分之一+y分之一=?已知x,y均为实数,且满足x(y+1)+y=8,x^2y+xy^2=12,则x分之一+y分之一=?已知

若实数xy满足x-y+1若实数xy满足x-y+1若实数xy满足x-y+10.51做出y=x+1图像，直线上方都是y对应x的点，于是最小值的问题演变成了xy这条直线最短的问题，当y=x+1时，得到最小值

已知实数x,y满足不等式组x≥0,y≥0,x+y≤1,则x^2+y^2-2x-2y的最小值已知实数x,y满足不等式组x≥0,y≥0,x+y≤1,则x^2+y^2-2x-2y的最小值已知实数x,y满足不

已知实数x,y满足y=√x-8+√16-2x+1/2,求xy的平方根已知实数x,y满足y=√x-8+√16-2x+1/2,求xy的平方根已知实数x,y满足y=√x-8+√16-2x+1/2,求xy的平

已知实数x,y满足,X-2y≥-4,3x-2y≤12,x+y≥2,则y/(x+1)的取值范围已知实数x,y满足,X-2y≥-4,3x-2y≤12,x+y≥2,则y/(x+1)的取值范围已知实数x,y满

已知实数xy满足x²﹢y²-xy+2x-y+1=0求xy已知实数xy满足x²﹢y²-xy+2x-y+1=0求xy已知实数xy满足x²﹢y²-

有关一元二次方程组的问题已知实数x.y满足x^2+4y^2≤1,求0.25×x^2+y^2+3xy的最大值有关一元二次方程组的问题已知实数x.y满足x^2+4y^2≤1,求0.25×x^2+y^2+3

已知实数x,y满足x2-2xy+4y2-x-2y+1≤0,求x和y的值已知实数x,y满足x2-2xy+4y2-x-2y+1≤0,求x和y的值已知实数x,y满足x2-2xy+4y2-x-2y+1≤0,求

已知正实数xy满足x+y=1,求1/(2x+y)+4/(2x+3y)最小值已知正实数xy满足x+y=1,求1/(2x+y)+4/(2x+3y)最小值已知正实数xy满足x+y=1,求1/(2x+y)+4

已知实数x、y满足X2+y2-xy+2x-y+1=0,试求x、y的值已知实数x、y满足X2+y2-xy+2x-y+1=0,试求x、y的值已知实数x、y满足X2+y2-xy+2x-y+1=0,试求x、y

已知实数x,y满足(x2)+(y2)-xy+2x-y+1=0,求x,y的值已知实数x,y满足(x2)+(y2)-xy+2x-y+1=0,求x,y的值已知实数x,y满足(x2)+(y2)-xy+2x-y

已知实数x、y满足X2+y2-xy+2x-y+1=0,试求x、y的值已知实数x、y满足X2+y2-xy+2x-y+1=0,试求x、y的值已知实数x、y满足X2+y2-xy+2x-y+1=0,试求x、y

已知实数xy,满足10x²-2xy+y²+6x+1=0,求x+y已知实数xy,满足10x²-2xy+y²+6x+1=0,求x+y已知实数xy,满足10x