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题目设P为双曲线x2a2-y2b2=1(a>0,b>0)上任一点,双曲线在P处的切线与x轴交于点Q,F1,F2为焦点.证明:PQ平分∠F1PF2.这是《中等数学》数学奥林匹克高中训练题
The topic supposes that P is any point on the hyperbola x2a2-y2b2 = 1 (a> 0, b> 0), the tangent of the hyperbola at P and the x-axis intersect at the points Q, F1 and F2 as the focus. Proof: PQ bisects ∠F1PF2 This is a “medium math” math Olympiad high school training question