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qiu xian xing gui hua wen ti de xin shi jiao bu deng shi jie fa
Author(s): 
Pages: 29-31
Year: Issue:  6
Journal: ZHONGXUE SHUXUE ZAZHI(GAOZHONG BAN)

Abstract:  线性规划是高中试验教材新增内容之一,在近年的高考中常以选择题、填空题的形式出现.解这类问题,通常都要先利用线性约束条件作出可行域,然后根据几何意义找到目标函数的最优解,但这种方法比较麻烦,既要画线,又要找点,比较费时.如果我们从目标函数中解出x或y,并将其代入约束条件,则可利用不等式的性质以及解不等式的方法,使问题迅速获解.下面,以2009年高考试题为例,予以说明.
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