对数函数 - 百度百科
一般地，函数y=logaX（a>0，且a≠1）叫做对数函数，也就是说以幂（真数）为自变量，指数为因变量，底数为常量的函数，叫对数函数。 其中x是自变量，函数的 定义域 是（0，+∞），即x>0。 它实际上就是 指数函数 的 反函数，可表示为x=a y。 因此指数函数里对于a的规定，同样适用于对数函数。 “log”是 拉丁文 logarithm（对数）的缩写，读作： [英] [lɔɡ] [美] [lɔɡ, lɑɡ]。 对数函数是6类 基本初等函数 之一。 其中 对数 的定义： 如果a x =N（a>0，且a≠1），那么数x叫做以a …
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lg的运算法则是什么 - 百度知道
2007年10月10日 · lgx是表示以10为底数的对数函数，所有的对数函数运算法则也适用于lgx。 对于对数函数y=logₐx，其中a叫做对数的底数，x叫做真数。 当a>1时，如果底数一样，真数越大，函数值越大。 当0<a<1时，如果底数一样，真数越小，函数值越大。 lg的运算法则是什么 ?lg的运算法则包括如下法则。 1、lg的加法法则lgA+lgB=lg (A*B)2、lg的减法法则lgA-lgB=lg (A/B)3、乘方法则10^lgA=Algx是表示以10为底数的对数函数，所有的对数函数运算法则也适用于lgx。 扩展.
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LG X Power Review - PCMag
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Logarithm Calculator - log(x), ln(x), lg(x), lb(x) | Good Calculators
A binary logarithm, or a logarithm to base 2, is applied in computing, while the field of economics utilizes base e, and in education base 10, written simply as log x, log 10 x or lg x, is used. By organizing numbers according to these bases, real numbers can be expressed far more simply.