若实数x,y满足x^2/4+y^2/3=1,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?
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 ?
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x^2/4+y^2/3=1,则x+2y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
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2x²+3y²=1,S=3x²-2y²,则S的取值范围是
已知实数x,y满足(x+2)^2+(y-3)^2=1,则3x+4y-26的取值范围是
已知实数x,y满足{x≧0 y≧x 4x+3y≦12}.z=2y+3/x+1 的取值范围
如果实数x,y满足x∧2+y∧2-4x+3=0.则y/x的取值范围是
若实数x、y满足条件x²-y²=1,则(1/x²)+(2y/x)的取值范围是?