如何解决这个圆锥曲线问题?�用单调性可以证明在长轴上的情况,在长轴外用计算器试了下是正确的? 知乎 Template




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tomski如何解决这个圆锥曲线问题?�用单调性可以证明在长轴上的情况,在长轴外用计算器试了下是正确的? 知乎 coloring