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2009年全国卷工理22题是一道线性规划问题,其解答过程中出现的错误比较隐蔽,不易被觉察.1题目设函数f(x)=x3+3bx2+3cx存在两个极值
2009 National Volume 22 questions is a linear programming problem, the answer to the mistakes in the process of relatively hidden, not easy to be aware of.1 The subject set function f (x) = x3 + 3bx2 +3 cx there are two extreme values