若实数x,y满足3X^2+2Y^2=6 ,则X^2+Y^2的取值范围是?
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
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
若实数X Y满足y=2x+1,且x小于等于2y大于等于3,则y/x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
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?
实数x,y满足x≥2y≥2x+y<6则x+3y的取值范围是( )
若实数x、y满足2x^2+3y^2=1,s=3x^2-2y^2,则S的取值范围是
若实数x,y满足x^2/4+y^2/3=1,则x+2y的取值范围是
若实数x,y满足2x²+3y²=1,S=3x²-2y²,则S的取值范围是
若实数xy满足y≤2x+3,且y=x^2,则y/(x-12)的取值范围是
若实数x,y满足3x^2+6 y^2=6x分别求x与x^2+y^2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