农民叔叔阿根很想用20米长的金属网建一个靠墙的长方形鸡舍(如图).要使所建的鸡舍面积最大,BC的长应是多少米? 不要百度上的!百度答案不唯一,
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![农民叔叔阿根很想用20米长的金属网建一个靠墙的长方形鸡舍(如图).要使所建的鸡舍面积最大,BC的长应是多少米? 不要百度上的!百度答案不唯一,](/uploads/image/z/11951016-24-6.jpg?t=%E5%86%9C%E6%B0%91%E5%8F%94%E5%8F%94%E9%98%BF%E6%A0%B9%E5%BE%88%E6%83%B3%E7%94%A820%E7%B1%B3%E9%95%BF%E7%9A%84%E9%87%91%E5%B1%9E%E7%BD%91%E5%BB%BA%E4%B8%80%E4%B8%AA%E9%9D%A0%E5%A2%99%E7%9A%84%E9%95%BF%E6%96%B9%E5%BD%A2%E9%B8%A1%E8%88%8D%EF%BC%88%E5%A6%82%E5%9B%BE%EF%BC%89.%E8%A6%81%E4%BD%BF%E6%89%80%E5%BB%BA%E7%9A%84%E9%B8%A1%E8%88%8D%E9%9D%A2%E7%A7%AF%E6%9C%80%E5%A4%A7%2CBC%E7%9A%84%E9%95%BF%E5%BA%94%E6%98%AF%E5%A4%9A%E5%B0%91%E7%B1%B3%3F+%E4%B8%8D%E8%A6%81%E7%99%BE%E5%BA%A6%E4%B8%8A%E7%9A%84%21%E7%99%BE%E5%BA%A6%E7%AD%94%E6%A1%88%E4%B8%8D%E5%94%AF%E4%B8%80%2C)
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