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【摘 要】先通過演绎，逻辑推导得到正割函数的公式，再利用数学归纳法证明正割函数的n阶导数公式。
【关键词】n阶导数；正割函数；数学归纳法
【中图分类号】G633.6 【文献标识码】A
【文章编号】2095-3089（2019）02-0024-02
Abstract：The formula of secant function is deduced by logical derivation. We then show that this formula isn-order derivative for secant function via using the mathematical induction.
Keywords：n-order derivative，secant function，mathematical induction
【关键词】n阶导数；正割函数；数学归纳法
【中图分类号】G633.6 【文献标识码】A
【文章编号】2095-3089（2019）02-0024-02
Abstract：The formula of secant function is deduced by logical derivation. We then show that this formula isn-order derivative for secant function via using the mathematical induction.
Keywords：n-order derivative，secant function，mathematical induction