圆锥曲线的几何性质 ,主要包括曲线的范围 ,曲线的对称性 ,曲线的离心率、准线、渐近线等 .解答这类问题 ,除了充分利用圆锥曲线的这些性质外 ,还要注意挖掘题目所隐含的新的几何性质 ,使解题更直观、灵活 .例 1　已知椭圆C的方程为 x24 +y23=1,试确定实数m的取值范围 ,使得在? The geometric properties of the conic section mainly include the range of the curve, the symmetry of the curve, the eccentricity of the curve, the quasi-line, the asymptote, etc. To answer these questions, besides making full use of these properties of the conic section, we must pay attention to the topic of excavation. The implied new geometric properties make the solution more intuitive and flexible. Example 1 Given that the equation of the ellipse C is x24 +y23=1, try to determine the range of the real number m so that