如图所示,抛物线y=-x2+2x+3与x轴交于A、B两点,直线BD的函数表达式为y=- 3 x+3 3 ,抛物线的对称轴l与直如图所示,抛物线y=-x2+2x+3与x轴交于A、B两点,直线BD的函数表达式为y=-根号下3*x+3倍根号3 ,抛物
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![如图所示,抛物线y=-x2+2x+3与x轴交于A、B两点,直线BD的函数表达式为y=- 3 x+3 3 ,抛物线的对称轴l与直如图所示,抛物线y=-x2+2x+3与x轴交于A、B两点,直线BD的函数表达式为y=-根号下3*x+3倍根号3 ,抛物](/uploads/image/z/1965716-44-6.jpg?t=%E5%A6%82%E5%9B%BE%E6%89%80%E7%A4%BA%2C%E6%8A%9B%E7%89%A9%E7%BA%BFy%3D-x2%2B2x%2B3%E4%B8%8Ex%E8%BD%B4%E4%BA%A4%E4%BA%8EA%E3%80%81B%E4%B8%A4%E7%82%B9%2C%E7%9B%B4%E7%BA%BFBD%E7%9A%84%E5%87%BD%E6%95%B0%E8%A1%A8%E8%BE%BE%E5%BC%8F%E4%B8%BAy%3D-+3+x%2B3+3+%2C%E6%8A%9B%E7%89%A9%E7%BA%BF%E7%9A%84%E5%AF%B9%E7%A7%B0%E8%BD%B4l%E4%B8%8E%E7%9B%B4%E5%A6%82%E5%9B%BE%E6%89%80%E7%A4%BA%2C%E6%8A%9B%E7%89%A9%E7%BA%BFy%3D-x2%2B2x%2B3%E4%B8%8Ex%E8%BD%B4%E4%BA%A4%E4%BA%8EA%E3%80%81B%E4%B8%A4%E7%82%B9%2C%E7%9B%B4%E7%BA%BFBD%E7%9A%84%E5%87%BD%E6%95%B0%E8%A1%A8%E8%BE%BE%E5%BC%8F%E4%B8%BAy%3D-%E6%A0%B9%E5%8F%B7%E4%B8%8B3%2Ax%2B3%E5%80%8D%E6%A0%B9%E5%8F%B73+++%2C%E6%8A%9B%E7%89%A9)
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