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学以致用,是新课标的主旨.认真审题,将实际问题转化为二次函数的模型,并应用其性质解实际问题,更是中考热点.求解的关键是正确写出相关二次函数的解析式.现通过两例实际问题,加以说明,供参考,一、求最大销售收入问题.例题1春节期间某水库养殖场为适应市场需求,连续20天时间,采用每天降低水位以减少捕捞成本的办法,对水库中某种鲜鱼进行捕捞、销售.
Learn to use, is the thrust of the new curriculum standard.Cautious questions, the actual problem into a quadratic function model, and the application of its nature to solve practical problems, it is hot in the test. Solving the key is to correctly write the analysis of the relevant quadratic function Now through two practical problems, to illustrate, for reference, one, seeking maximum sales revenue .Example 1 during the Spring Festival to a reservoir farm to meet market demand, for 20 days, using daily water level to reduce fishing costs Methods to catch some fresh fish in the reservoir, sales.