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Numerator

Usage

Numerator[expr] 给出 expr的分子.


Notes

Numerator挑选出近负指数项. Denominator挑选剩下的项.
• 一个指数是"表面负"的是指该指数有一个负数因子. • 有理表达式的幂的乘积标准表示意味着你不能使用Part对分子进行化简.
Numerator可被用到有理数.
参见Mathematica 全书: 1.4.7.
• 同时参见: ExpandNumerator.
Further Examples

See the Further Examples for Denominator.



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