已知抛物线y=x-4x+k的顶点为P,与x轴相交于点A、B. (1)若△ABP为直角三角形,求k的值;(3)已知抛物线y=x平方-4x+k的顶点为P,与x轴相交于点A、B.(1)若△ABP为直角三角形,求k的值;
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![已知抛物线y=x-4x+k的顶点为P,与x轴相交于点A、B. (1)若△ABP为直角三角形,求k的值;(3)已知抛物线y=x平方-4x+k的顶点为P,与x轴相交于点A、B.(1)若△ABP为直角三角形,求k的值;](/uploads/image/z/7799746-58-6.jpg?t=%E5%B7%B2%E7%9F%A5%E6%8A%9B%E7%89%A9%E7%BA%BFy%EF%BC%9Dx%EF%BC%8D4x%EF%BC%8Bk%E7%9A%84%E9%A1%B6%E7%82%B9%E4%B8%BAP%2C%E4%B8%8Ex%E8%BD%B4%E7%9B%B8%E4%BA%A4%E4%BA%8E%E7%82%B9A%E3%80%81B%EF%BC%8E+%EF%BC%881%EF%BC%89%E8%8B%A5%E2%96%B3ABP%E4%B8%BA%E7%9B%B4%E8%A7%92%E4%B8%89%E8%A7%92%E5%BD%A2%2C%E6%B1%82k%E7%9A%84%E5%80%BC%EF%BC%9B%EF%BC%883%EF%BC%89%E5%B7%B2%E7%9F%A5%E6%8A%9B%E7%89%A9%E7%BA%BFy%EF%BC%9Dx%E5%B9%B3%E6%96%B9%EF%BC%8D4x%EF%BC%8Bk%E7%9A%84%E9%A1%B6%E7%82%B9%E4%B8%BAP%2C%E4%B8%8Ex%E8%BD%B4%E7%9B%B8%E4%BA%A4%E4%BA%8E%E7%82%B9A%E3%80%81B%EF%BC%8E%EF%BC%881%EF%BC%89%E8%8B%A5%E2%96%B3ABP%E4%B8%BA%E7%9B%B4%E8%A7%92%E4%B8%89%E8%A7%92%E5%BD%A2%2C%E6%B1%82k%E7%9A%84%E5%80%BC%EF%BC%9B)
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