如果关于X的方程X²-2(1-K)X+K²=0有实数根α,β,那么α+β的取值范围是多少?2.餐桌桌布长为160cm,宽为100cm的长方形,妈妈准备设计一块桌布,面积是桌面的2倍,且使四周垂下的边等宽,小
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![如果关于X的方程X²-2(1-K)X+K²=0有实数根α,β,那么α+β的取值范围是多少?2.餐桌桌布长为160cm,宽为100cm的长方形,妈妈准备设计一块桌布,面积是桌面的2倍,且使四周垂下的边等宽,小](/uploads/image/z/1022674-58-4.jpg?t=%E5%A6%82%E6%9E%9C%E5%85%B3%E4%BA%8EX%E7%9A%84%E6%96%B9%E7%A8%8BX%26%23178%3B-2%281-K%29X%2BK%26%23178%3B%3D0%E6%9C%89%E5%AE%9E%E6%95%B0%E6%A0%B9%CE%B1%2C%CE%B2%2C%E9%82%A3%E4%B9%88%CE%B1%2B%CE%B2%E7%9A%84%E5%8F%96%E5%80%BC%E8%8C%83%E5%9B%B4%E6%98%AF%E5%A4%9A%E5%B0%91%3F2.%E9%A4%90%E6%A1%8C%E6%A1%8C%E5%B8%83%E9%95%BF%E4%B8%BA160cm%EF%BC%8C%E5%AE%BD%E4%B8%BA100cm%E7%9A%84%E9%95%BF%E6%96%B9%E5%BD%A2%EF%BC%8C%E5%A6%88%E5%A6%88%E5%87%86%E5%A4%87%E8%AE%BE%E8%AE%A1%E4%B8%80%E5%9D%97%E6%A1%8C%E5%B8%83%EF%BC%8C%E9%9D%A2%E7%A7%AF%E6%98%AF%E6%A1%8C%E9%9D%A2%E7%9A%842%E5%80%8D%EF%BC%8C%E4%B8%94%E4%BD%BF%E5%9B%9B%E5%91%A8%E5%9E%82%E4%B8%8B%E7%9A%84%E8%BE%B9%E7%AD%89%E5%AE%BD%EF%BC%8C%E5%B0%8F)
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