已知动点P与双曲线x^2-y^2=1的两个焦点F1 F2的距离之和为定值,且cos∠F1PF2的最小值为-1/31.求动点P的轨迹方程2.设M(0,-1),若斜率为k(k不等于0)的直线l与P点轨迹交于不同的两点A B ,要使|MA|=|MB|
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![已知动点P与双曲线x^2-y^2=1的两个焦点F1 F2的距离之和为定值,且cos∠F1PF2的最小值为-1/31.求动点P的轨迹方程2.设M(0,-1),若斜率为k(k不等于0)的直线l与P点轨迹交于不同的两点A B ,要使|MA|=|MB|](/uploads/image/z/2588577-33-7.jpg?t=%E5%B7%B2%E7%9F%A5%E5%8A%A8%E7%82%B9P%E4%B8%8E%E5%8F%8C%E6%9B%B2%E7%BA%BFx%5E2-y%5E2%3D1%E7%9A%84%E4%B8%A4%E4%B8%AA%E7%84%A6%E7%82%B9F1+F2%E7%9A%84%E8%B7%9D%E7%A6%BB%E4%B9%8B%E5%92%8C%E4%B8%BA%E5%AE%9A%E5%80%BC%2C%E4%B8%94cos%E2%88%A0F1PF2%E7%9A%84%E6%9C%80%E5%B0%8F%E5%80%BC%E4%B8%BA-1%2F31.%E6%B1%82%E5%8A%A8%E7%82%B9P%E7%9A%84%E8%BD%A8%E8%BF%B9%E6%96%B9%E7%A8%8B2.%E8%AE%BEM%EF%BC%880%2C-1%EF%BC%89%2C%E8%8B%A5%E6%96%9C%E7%8E%87%E4%B8%BAk%EF%BC%88k%E4%B8%8D%E7%AD%89%E4%BA%8E0%EF%BC%89%E7%9A%84%E7%9B%B4%E7%BA%BFl%E4%B8%8EP%E7%82%B9%E8%BD%A8%E8%BF%B9%E4%BA%A4%E4%BA%8E%E4%B8%8D%E5%90%8C%E7%9A%84%E4%B8%A4%E7%82%B9A+B+%2C%E8%A6%81%E4%BD%BF%7CMA%7C%3D%7CMB%7C)
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