Preparing

摘要： definition 设\(y=f[\phi (x)]\)由 \(y=f(u), u=(x)\) 复合组成. \(f[\phi (x)]在点x_{0}\)的某一去心邻域内有定义. 假若: \[\lim_{x \to x_{0}} \phi (x)=u_{0} \\ \\ \lim_{u \to u_ 阅读全文