急如图,抛物线y=ax^2-10ax+8与x轴交于A、C两点,与y轴交于点B,且C点的坐标为(2,0)1.设点D是线段OA上一个动点,过点D作DE⊥x轴交AB于点E,过E作EF⊥y轴,垂足为F.记OD=x,矩形ODEF的面积为S,求S与x之间的函数
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![急如图,抛物线y=ax^2-10ax+8与x轴交于A、C两点,与y轴交于点B,且C点的坐标为(2,0)1.设点D是线段OA上一个动点,过点D作DE⊥x轴交AB于点E,过E作EF⊥y轴,垂足为F.记OD=x,矩形ODEF的面积为S,求S与x之间的函数](/uploads/image/z/10339556-68-6.jpg?t=%E6%80%A5%E5%A6%82%E5%9B%BE%2C%E6%8A%9B%E7%89%A9%E7%BA%BFy%3Dax%5E2-10ax%2B8%E4%B8%8Ex%E8%BD%B4%E4%BA%A4%E4%BA%8EA%E3%80%81C%E4%B8%A4%E7%82%B9%2C%E4%B8%8Ey%E8%BD%B4%E4%BA%A4%E4%BA%8E%E7%82%B9B%2C%E4%B8%94C%E7%82%B9%E7%9A%84%E5%9D%90%E6%A0%87%E4%B8%BA%282%2C0%291.%E8%AE%BE%E7%82%B9D%E6%98%AF%E7%BA%BF%E6%AE%B5OA%E4%B8%8A%E4%B8%80%E4%B8%AA%E5%8A%A8%E7%82%B9%2C%E8%BF%87%E7%82%B9D%E4%BD%9CDE%E2%8A%A5x%E8%BD%B4%E4%BA%A4AB%E4%BA%8E%E7%82%B9E%2C%E8%BF%87E%E4%BD%9CEF%E2%8A%A5y%E8%BD%B4%2C%E5%9E%82%E8%B6%B3%E4%B8%BAF.%E8%AE%B0OD%3Dx%2C%E7%9F%A9%E5%BD%A2ODEF%E7%9A%84%E9%9D%A2%E7%A7%AF%E4%B8%BAS%2C%E6%B1%82S%E4%B8%8Ex%E4%B9%8B%E9%97%B4%E7%9A%84%E5%87%BD%E6%95%B0)
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