实数x,y满足x2-2x-4y=5,记t=x-2y,则t的取值范围是
实数xy满足x2—2x—4y=5,记t=x-2y,则t的取值范围
实数x,y满足x²-2x-4y=6,记t=x-2y,则t的取值范围是
实数x,y满足x²-2x-4y=5,记t=x-2y,则t的取值范围为
实数x,y满足x平方-2x-4y=6,记t=x-2y,则t的取值范围
实数x,y满足x²-2x-4y=6,若t=x-2y,则t的取值范围
实数x,y满足x2-2x-4y=5,则x-2y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?
已知实数x,y满足x2+y2-4x+1=0,求2x+y的取值范围?
已知实数x,y满足x2+y2=4,求x+y的取值范围
已知实数x,y满足x2+y2=2x,则x2y2的取值范围是______.
设实数xy满足x2 +2y2=6,则x+y的取值范围
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