九年级下数学题(二次函数)某种蔬菜的销售单价与销售月份之间的关系如图(1)所示,成本与销售月份之间的关系如图(2)所示.哪个月出售这种蔬菜,每千克的收益最大? 一定要详细过程
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![九年级下数学题(二次函数)某种蔬菜的销售单价与销售月份之间的关系如图(1)所示,成本与销售月份之间的关系如图(2)所示.哪个月出售这种蔬菜,每千克的收益最大? 一定要详细过程](/uploads/image/z/13442560-16-0.jpg?t=%E4%B9%9D%E5%B9%B4%E7%BA%A7%E4%B8%8B%E6%95%B0%E5%AD%A6%E9%A2%98%EF%BC%88%E4%BA%8C%E6%AC%A1%E5%87%BD%E6%95%B0%EF%BC%89%E6%9F%90%E7%A7%8D%E8%94%AC%E8%8F%9C%E7%9A%84%E9%94%80%E5%94%AE%E5%8D%95%E4%BB%B7%E4%B8%8E%E9%94%80%E5%94%AE%E6%9C%88%E4%BB%BD%E4%B9%8B%E9%97%B4%E7%9A%84%E5%85%B3%E7%B3%BB%E5%A6%82%E5%9B%BE%EF%BC%881%EF%BC%89%E6%89%80%E7%A4%BA%2C%E6%88%90%E6%9C%AC%E4%B8%8E%E9%94%80%E5%94%AE%E6%9C%88%E4%BB%BD%E4%B9%8B%E9%97%B4%E7%9A%84%E5%85%B3%E7%B3%BB%E5%A6%82%E5%9B%BE%EF%BC%882%EF%BC%89%E6%89%80%E7%A4%BA.%E5%93%AA%E4%B8%AA%E6%9C%88%E5%87%BA%E5%94%AE%E8%BF%99%E7%A7%8D%E8%94%AC%E8%8F%9C%2C%E6%AF%8F%E5%8D%83%E5%85%8B%E7%9A%84%E6%94%B6%E7%9B%8A%E6%9C%80%E5%A4%A7%3F++%E4%B8%80%E5%AE%9A%E8%A6%81%E8%AF%A6%E7%BB%86%E8%BF%87%E7%A8%8B)
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