抛物线y=x平方+2x-3与x轴交于A B……在抛物线对称轴上是否存在点P,使点P到A,C两点距离之差最小A(-3,0)B(1,0)C(0,-3) 注意是最小,最好有证明
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![抛物线y=x平方+2x-3与x轴交于A B……在抛物线对称轴上是否存在点P,使点P到A,C两点距离之差最小A(-3,0)B(1,0)C(0,-3) 注意是最小,最好有证明](/uploads/image/z/10774134-54-4.jpg?t=%E6%8A%9B%E7%89%A9%E7%BA%BFy%3Dx%E5%B9%B3%E6%96%B9%2B2x-3%E4%B8%8Ex%E8%BD%B4%E4%BA%A4%E4%BA%8EA+B%E2%80%A6%E2%80%A6%E5%9C%A8%E6%8A%9B%E7%89%A9%E7%BA%BF%E5%AF%B9%E7%A7%B0%E8%BD%B4%E4%B8%8A%E6%98%AF%E5%90%A6%E5%AD%98%E5%9C%A8%E7%82%B9P%2C%E4%BD%BF%E7%82%B9P%E5%88%B0A%2CC%E4%B8%A4%E7%82%B9%E8%B7%9D%E7%A6%BB%E4%B9%8B%E5%B7%AE%E6%9C%80%E5%B0%8FA%EF%BC%88-3%EF%BC%8C0%EF%BC%89B%EF%BC%881%EF%BC%8C0%EF%BC%89C%EF%BC%880%EF%BC%8C-3%EF%BC%89+%E6%B3%A8%E6%84%8F%E6%98%AF%E6%9C%80%E5%B0%8F%EF%BC%8C%E6%9C%80%E5%A5%BD%E6%9C%89%E8%AF%81%E6%98%8E)
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