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文[1]对一道函数与不等式题进行了分析和反思,笔者在仔细研读之后,认为该分析的最后结果值得商榷.1.案例呈现题目已知二次函数f(x)对任意的x∈R
In [1], we analyze and reflect on a function and inequality problem. After careful study, the author thinks that the final result of this analysis is questionable.1 Case Presentation Problem It is known that the quadratic function f (x) R