1椭圆的两个焦点为F1(-1,0),F2(1,0),|F1F2|是|PF1|和|PF2|的等差中项.∠F2F1P=120°,求△PF1F2的面积(1)求椭圆方程(2)若∠F2F1P=120°,求△PF1F2的面积2.已知双曲线x^-y^/2=1,与点P(1,2),过P
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![1椭圆的两个焦点为F1(-1,0),F2(1,0),|F1F2|是|PF1|和|PF2|的等差中项.∠F2F1P=120°,求△PF1F2的面积(1)求椭圆方程(2)若∠F2F1P=120°,求△PF1F2的面积2.已知双曲线x^-y^/2=1,与点P(1,2),过P](/uploads/image/z/8843402-2-2.jpg?t=1%E6%A4%AD%E5%9C%86%E7%9A%84%E4%B8%A4%E4%B8%AA%E7%84%A6%E7%82%B9%E4%B8%BAF1%EF%BC%88-1%2C0%EF%BC%89%2CF2%EF%BC%881%2C0%EF%BC%89%2C%EF%BD%9CF1F2%EF%BD%9C%E6%98%AF%EF%BD%9CPF1%EF%BD%9C%E5%92%8C%EF%BD%9CPF2%EF%BD%9C%E7%9A%84%E7%AD%89%E5%B7%AE%E4%B8%AD%E9%A1%B9.%E2%88%A0F2F1P%3D120%C2%B0%2C%E6%B1%82%E2%96%B3PF1F2%E7%9A%84%E9%9D%A2%E7%A7%AF%EF%BC%881%EF%BC%89%E6%B1%82%E6%A4%AD%E5%9C%86%E6%96%B9%E7%A8%8B%EF%BC%882%EF%BC%89%E8%8B%A5%E2%88%A0F2F1P%3D120%C2%B0%2C%E6%B1%82%E2%96%B3PF1F2%E7%9A%84%E9%9D%A2%E7%A7%AF2.%E5%B7%B2%E7%9F%A5%E5%8F%8C%E6%9B%B2%E7%BA%BFx%5E-y%5E%2F2%3D1%2C%E4%B8%8E%E7%82%B9P%EF%BC%881%2C2%EF%BC%89%2C%E8%BF%87P)
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