如图,将矩形OABC放置在平面直角坐标系中,点D在边OC上,点E在边OA上,把矩形沿直线DE翻折,使点O落在边AB上的点F处,且tan∠BFD=4/3,若线段OA的长是一元二次方程x²-7x-8=0的一个根,又2AB=3OA,(1)求
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![如图,将矩形OABC放置在平面直角坐标系中,点D在边OC上,点E在边OA上,把矩形沿直线DE翻折,使点O落在边AB上的点F处,且tan∠BFD=4/3,若线段OA的长是一元二次方程x²-7x-8=0的一个根,又2AB=3OA,(1)求](/uploads/image/z/6955958-38-8.jpg?t=%E5%A6%82%E5%9B%BE%2C%E5%B0%86%E7%9F%A9%E5%BD%A2OABC%E6%94%BE%E7%BD%AE%E5%9C%A8%E5%B9%B3%E9%9D%A2%E7%9B%B4%E8%A7%92%E5%9D%90%E6%A0%87%E7%B3%BB%E4%B8%AD%2C%E7%82%B9D%E5%9C%A8%E8%BE%B9OC%E4%B8%8A%2C%E7%82%B9E%E5%9C%A8%E8%BE%B9OA%E4%B8%8A%2C%E6%8A%8A%E7%9F%A9%E5%BD%A2%E6%B2%BF%E7%9B%B4%E7%BA%BFDE%E7%BF%BB%E6%8A%98%2C%E4%BD%BF%E7%82%B9O%E8%90%BD%E5%9C%A8%E8%BE%B9AB%E4%B8%8A%E7%9A%84%E7%82%B9F%E5%A4%84%2C%E4%B8%94tan%E2%88%A0BFD%3D4%2F3%2C%E8%8B%A5%E7%BA%BF%E6%AE%B5OA%E7%9A%84%E9%95%BF%E6%98%AF%E4%B8%80%E5%85%83%E4%BA%8C%E6%AC%A1%E6%96%B9%E7%A8%8Bx%26%23178%3B-7x-8%3D0%E7%9A%84%E4%B8%80%E4%B8%AA%E6%A0%B9%2C%E5%8F%882AB%3D3OA%2C%EF%BC%881%EF%BC%89%E6%B1%82)
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