设实数x,y满足x^2+4y^2+2x-47+2=0,则x^2y+2x的值等于_________
设实数x,y满足x^2+4y^2+2x-47+2=0,则x^2y+2x的值等于_________
设实数X,Y满足条件X大于等于0,X小于等于Y,X+2Y-4小于等于,则Z=X+Y的最大值是
设实数X,Y满足约束条件{X+2Y等于-1;Y>等于0,则
设实数x y满足x大于等于0 x- 2y大于等于0x- y-2小于等于0 则2x+y的最大值
设实数X,Y满足2X+Y-2>=0,X-2Y+4>=0,3X-Y
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-Y+1大于等于0 X+Y大于等于0 X小于等于0则Z=X+2Y的最大值?
设实数X,Y满足X^2+Y^2=1,则3X+4Y的最大值为多少
设实数x,y,满足[(x^2)/16]+[(y^2)/9]=1,则[(y-4)/x](x≠0)的取值范围是?
设实数x,y满足方程9x²+4y²-3x+2y=0,则z=3x+2y的最大值
设Z=x+y,其中实数x,y满足不等式x+2y>=0,x-y
设z=x+y,其中实数x,y满足{x+2y>=0,x-y