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在解决有关导数问题时,一定要理清概念,弄清题意,以免掉入“陷阱”之中.一、求导时不注意原函数的定义域,会扩大解集
In resolving the derivative problem, we must clarify the concept, to clarify the problem, so as not to fall into the “trap.” First, pay attention to the domain of the original function will expand the solution set