已知二次函数y=x2+(4k+1)x+2k-1求证:该抛物线与x轴一定有两个交点若(x1,0)(x2,0)为抛物线与x轴的两个交点,且(x1-2)(x2-2)=2k-3,求k的值.注:题目中的x2是指x的2次(2)中的x2是因为有两个x而添加的下标
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![已知二次函数y=x2+(4k+1)x+2k-1求证:该抛物线与x轴一定有两个交点若(x1,0)(x2,0)为抛物线与x轴的两个交点,且(x1-2)(x2-2)=2k-3,求k的值.注:题目中的x2是指x的2次(2)中的x2是因为有两个x而添加的下标](/uploads/image/z/14664536-8-6.jpg?t=%E5%B7%B2%E7%9F%A5%E4%BA%8C%E6%AC%A1%E5%87%BD%E6%95%B0y%3Dx2%2B%284k%2B1%29x%2B2k-1%E6%B1%82%E8%AF%81%EF%BC%9A%E8%AF%A5%E6%8A%9B%E7%89%A9%E7%BA%BF%E4%B8%8Ex%E8%BD%B4%E4%B8%80%E5%AE%9A%E6%9C%89%E4%B8%A4%E4%B8%AA%E4%BA%A4%E7%82%B9%E8%8B%A5%28x1%2C0%29%28x2%2C0%29%E4%B8%BA%E6%8A%9B%E7%89%A9%E7%BA%BF%E4%B8%8Ex%E8%BD%B4%E7%9A%84%E4%B8%A4%E4%B8%AA%E4%BA%A4%E7%82%B9%2C%E4%B8%94%28x1-2%29%28x2-2%29%3D2k-3%2C%E6%B1%82k%E7%9A%84%E5%80%BC.%E6%B3%A8%EF%BC%9A%E9%A2%98%E7%9B%AE%E4%B8%AD%E7%9A%84x2%E6%98%AF%E6%8C%87x%E7%9A%842%E6%AC%A1%282%29%E4%B8%AD%E7%9A%84x2%E6%98%AF%E5%9B%A0%E4%B8%BA%E6%9C%89%E4%B8%A4%E4%B8%AAx%E8%80%8C%E6%B7%BB%E5%8A%A0%E7%9A%84%E4%B8%8B%E6%A0%87)
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