已知两点A(-√3,0),B(√3,0),过A点且方向向量为a=(1,√2)的直线l上满足||PA|-|PB||=2 的点P的个数为A.0 B.1C.2 D.不能确定
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![已知两点A(-√3,0),B(√3,0),过A点且方向向量为a=(1,√2)的直线l上满足||PA|-|PB||=2 的点P的个数为A.0 B.1C.2 D.不能确定](/uploads/image/z/14999688-0-8.jpg?t=%E5%B7%B2%E7%9F%A5%E4%B8%A4%E7%82%B9A%28-%E2%88%9A3%2C0%29%2CB%28%E2%88%9A3%2C0%29%2C%E8%BF%87A%E7%82%B9%E4%B8%94%E6%96%B9%E5%90%91%E5%90%91%E9%87%8F%E4%B8%BAa%3D%EF%BC%881%2C%E2%88%9A2%EF%BC%89%E7%9A%84%E7%9B%B4%E7%BA%BFl%E4%B8%8A%E6%BB%A1%E8%B6%B3%7C%7CPA%7C-%7CPB%7C%7C%3D2+%E7%9A%84%E7%82%B9P%E7%9A%84%E4%B8%AA%E6%95%B0%E4%B8%BAA.0+B.1C.2+D.%E4%B8%8D%E8%83%BD%E7%A1%AE%E5%AE%9A)
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