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=6,若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=5,记t=x-2y,则t的取值范围为
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
实数xy满足x2—2x—4y=5,记t=x-2y,则t的取值范围
若正实数x,y满足x+y=1,且t=2+x-14y.则当t取最大值时x的值为( )
若实数x,y满足2x*X+3y*y=1,S=3x*x-2y*y,则S的取值范围为
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x^2+y^2-6x-8y+24=0,则3x+4y-10的取值范围是
若实数x,y满足:xy=2-x,则x+2y的取值范围
若实数x、y满足条件x²-y²=1,则(1/x²)+(2y/x)的取值范围是?