高中数学解析几何一道题在等腰梯形ABCD中,AB//CD,且AB=2AD,设∠DAB=Θ,Θ∈(0,π/2),以A, B为焦点且过点D的双曲线的离心率为e1,以C,D为焦点且过点A的椭圆的离心率为 e2,随着Θ增大e1的变化趋势
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![高中数学解析几何一道题在等腰梯形ABCD中,AB//CD,且AB=2AD,设∠DAB=Θ,Θ∈(0,π/2),以A, B为焦点且过点D的双曲线的离心率为e1,以C,D为焦点且过点A的椭圆的离心率为 e2,随着Θ增大e1的变化趋势](/uploads/image/z/3168368-8-8.jpg?t=%E9%AB%98%E4%B8%AD%E6%95%B0%E5%AD%A6%E8%A7%A3%E6%9E%90%E5%87%A0%E4%BD%95%E4%B8%80%E9%81%93%E9%A2%98%E5%9C%A8%E7%AD%89%E8%85%B0%E6%A2%AF%E5%BD%A2ABCD%E4%B8%AD%EF%BC%8CAB%2F%2FCD%2C%E4%B8%94AB%3D2AD%2C%E8%AE%BE%E2%88%A0DAB%3D%CE%98%2C%CE%98%E2%88%88%EF%BC%880%2C%CF%80%2F2%29%2C%E4%BB%A5A%EF%BC%8C+B%E4%B8%BA%E7%84%A6%E7%82%B9%E4%B8%94%E8%BF%87%E7%82%B9D%E7%9A%84%E5%8F%8C%E6%9B%B2%E7%BA%BF%E7%9A%84%E7%A6%BB%E5%BF%83%E7%8E%87%E4%B8%BAe1%EF%BC%8C%E4%BB%A5C%2CD%E4%B8%BA%E7%84%A6%E7%82%B9%E4%B8%94%E8%BF%87%E7%82%B9A%E7%9A%84%E6%A4%AD%E5%9C%86%E7%9A%84%E7%A6%BB%E5%BF%83%E7%8E%87%E4%B8%BA+e2%EF%BC%8C%E9%9A%8F%E7%9D%80%CE%98%E5%A2%9E%E5%A4%A7e1%E7%9A%84%E5%8F%98%E5%8C%96%E8%B6%8B%E5%8A%BF)
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