一道二次函数题在矩形ABCD中,顶点B,C在x轴的正半轴上,D在抛物线y=-2/3x^2;+8/3x上,矩形的顶点均为动点,且矩形在抛物线与x轴围成的区域里,设点A的坐标为(x,y),矩形的周长为P1.求P关于x的函数解
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![一道二次函数题在矩形ABCD中,顶点B,C在x轴的正半轴上,D在抛物线y=-2/3x^2;+8/3x上,矩形的顶点均为动点,且矩形在抛物线与x轴围成的区域里,设点A的坐标为(x,y),矩形的周长为P1.求P关于x的函数解](/uploads/image/z/7624194-42-4.jpg?t=%E4%B8%80%E9%81%93%E4%BA%8C%E6%AC%A1%E5%87%BD%E6%95%B0%E9%A2%98%E5%9C%A8%E7%9F%A9%E5%BD%A2ABCD%E4%B8%AD%2C%E9%A1%B6%E7%82%B9B%2CC%E5%9C%A8x%E8%BD%B4%E7%9A%84%E6%AD%A3%E5%8D%8A%E8%BD%B4%E4%B8%8A%2CD%E5%9C%A8%E6%8A%9B%E7%89%A9%E7%BA%BFy%3D-2%2F3x%5E2%3B%2B8%2F3x%E4%B8%8A%2C%E7%9F%A9%E5%BD%A2%E7%9A%84%E9%A1%B6%E7%82%B9%E5%9D%87%E4%B8%BA%E5%8A%A8%E7%82%B9%2C%E4%B8%94%E7%9F%A9%E5%BD%A2%E5%9C%A8%E6%8A%9B%E7%89%A9%E7%BA%BF%E4%B8%8Ex%E8%BD%B4%E5%9B%B4%E6%88%90%E7%9A%84%E5%8C%BA%E5%9F%9F%E9%87%8C%2C%E8%AE%BE%E7%82%B9A%E7%9A%84%E5%9D%90%E6%A0%87%E4%B8%BA%EF%BC%88x%2Cy%29%2C%E7%9F%A9%E5%BD%A2%E7%9A%84%E5%91%A8%E9%95%BF%E4%B8%BAP1.%E6%B1%82P%E5%85%B3%E4%BA%8Ex%E7%9A%84%E5%87%BD%E6%95%B0%E8%A7%A3)
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