利用数学归纳法证明了一个关于正值函数的不等式，并举例说明了其应用。
This paper proves an inequality based on a positive function with mathematical induction and demonstrates its application with examples.
该文讨论傅氏变换中的二个时域积分特性，在求解频谱函数中的应用方法，并举例予以说明。
This paper discusses the application methods on solving frequency function and sets examples, in the two integral characters of time domain on Fourier conversion.
通过对两个求导例题的分析，归纳出求函数在某些特殊点导数的新的解法定理及推论，并举例说明它们的应用，最后对此求导方法进行总结。
Through analyzing two examples of seeking derivative, new theorem and deduction for solution to some functions derivation under the special condition are concluded, and examples are shown.
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