实数x、y满足x≥y≥1和2x^2-xy+5x-y+4=0,则x+y=___
实数x、y满足x≥y≥1和2x^2-xy+5x-y+4=0,则x+y=___
实数x,y满足x≥y≥1和2x2-xy-5x+y+4=0,则x+y=______.
实数x'y满足x≥y≥1和2x^2-xy-5x+y+4=0求x'y的值
实数x y满足x≥y≥1和2x²-xy-5x+y+4=0求x+y之值
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
设实数x,y满足x²+1/2y²4-xy+2y=0.则x=___,y=___
已知实数x,y满足x²+y²-xy+2x-y+1=0 求x y
已知实数x,y满足5x²+2y²+1=6xy+4x-2y,则x²-xy+2000y
若正实数x.y满足x+y=xy,则x+2y的最小值
实数XY满足X*X+Y*Y+2X-4Y+1=0,求Y/(X-4)的最大值和最小值及根号下X*X+Y*Y+2X+1的最大值
若实数xy满足x-y 1≥0,x y≥0,x≤0,则z=3“x 2y的最小值是多少
若实数xy满足x-y+1≥0,x+y≥0,x≤0,则z=3“x+2y的最小值是多少