设实数x、y满足x^2+4y^2=4x,则x+y的范围是?
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?
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?
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
若实数x,y满足x^2+y^2-6x-4y+12=0,则x^2+y^2的取值范围是
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
设实数x,y满足y≥x+1,2x-4y-1≤0 ,2y+x-11≤0 则y²/x的取值范围是
设实数X,Y满足X^2+Y^2=1,则3X+4Y的最大值为多少
设x、y满足约束条件{x≥0 y≥x 4x+3y≤12}则2y+3/x+1的取值范围是?
实数x,y满足x²-2x-4y=6,记t=x-2y,则t的取值范围是
如果实数x,y满足x∧2+y∧2-4x+3=0.则y/x的取值范围是
设实数X,Y满足2X+Y-2>=0,X-2Y+4>=0,3X-Y
已知实数x,y满足x^2+y^2+4x-2y-4=0,则x^2+y^2的取值范围是多少