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可以投機取巧P為圓與X軸的交點是,得到M(1/2,0),(-1/2,0),此乃雙曲線的頂點再來看自A分別作圓C的切線PB,PD,顯見此時PA中垂線與PC平行,沒有交點這就是M曲線的漸近線易得:BC=1,AC=C,AB=√3,漸近線方程y=±√3高中階段…
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