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底数 (指数)

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底数(英语:base,base number[1])又称基数,常简称为,是指数函数中的,或是对数函数中的

指数函数

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在指数中,数字n称为指数,也常表示为bn次方。例如,10的四次方是10,000,因为104 = 10 × 10 × 10 × 10 = 10,000

方根

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bn次方等于aa = bn),则b称为是an次方根。例如,10是10,000的四次方根。

对数

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底为b的指数函数,其反函数(假设定义良好)称为底为b对数,写成logb。因此

logb a = n.

例如,log10 10,000 = 4.

参考资料

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  1. ^ 存档副本. [2023-07-09]. (原始内容存档于2023-07-09). 
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底数 (指数)
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