求曲线外一点切线方程曲线上一点的切线方程我会做了,就是求导数,然后把该点坐标带进去用(y-y.)=f'(x-x.)现在要过切线外一点,怎么求呢?我不会算切点坐标
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![求曲线外一点切线方程曲线上一点的切线方程我会做了,就是求导数,然后把该点坐标带进去用(y-y.)=f'(x-x.)现在要过切线外一点,怎么求呢?我不会算切点坐标](/uploads/image/z/12972468-12-8.jpg?t=%E6%B1%82%E6%9B%B2%E7%BA%BF%E5%A4%96%E4%B8%80%E7%82%B9%E5%88%87%E7%BA%BF%E6%96%B9%E7%A8%8B%E6%9B%B2%E7%BA%BF%E4%B8%8A%E4%B8%80%E7%82%B9%E7%9A%84%E5%88%87%E7%BA%BF%E6%96%B9%E7%A8%8B%E6%88%91%E4%BC%9A%E5%81%9A%E4%BA%86%2C%E5%B0%B1%E6%98%AF%E6%B1%82%E5%AF%BC%E6%95%B0%2C%E7%84%B6%E5%90%8E%E6%8A%8A%E8%AF%A5%E7%82%B9%E5%9D%90%E6%A0%87%E5%B8%A6%E8%BF%9B%E5%8E%BB%E7%94%A8%28y-y.%29%3Df%27%28x-x.%29%E7%8E%B0%E5%9C%A8%E8%A6%81%E8%BF%87%E5%88%87%E7%BA%BF%E5%A4%96%E4%B8%80%E7%82%B9%2C%E6%80%8E%E4%B9%88%E6%B1%82%E5%91%A2%3F%E6%88%91%E4%B8%8D%E4%BC%9A%E7%AE%97%E5%88%87%E7%82%B9%E5%9D%90%E6%A0%87)
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