#1**+20 **

**how do i change the base of log?**

Change of base

The logarithm \(log_b(x)\) can be computed from the logarithms of \(x\) and \(b\) with respect to an arbitrary base \(k\) using the following formula:

\(\qquad {\displaystyle \log _{b}(x)={\frac {\log _{k}(x)}{\log _{k}(b)}}.\,}\) ,

Typical scientific calculators calculate the logarithms to bases 10 and \(e\).

Logarithms with respect to any base b can be determined using either of these two logarithms by the previous formula:

\(\qquad {\displaystyle \log _{b}(x)={\frac {\log _{10}(x)}{\log _{10}(b)}}={\frac {\log _{e}(x)}{\log _{e}(b)}}.\,}\)

Given a number \(x\) and its logarithm \(log_b(x)\) to an unknown base \(b\), the base is given by:

\(\qquad {\displaystyle b=x^{\frac {1}{\log _{b}(x)}}.}\)

heureka
Feb 23, 2017

#1**+20 **

Best Answer

**how do i change the base of log?**

Change of base

The logarithm \(log_b(x)\) can be computed from the logarithms of \(x\) and \(b\) with respect to an arbitrary base \(k\) using the following formula:

\(\qquad {\displaystyle \log _{b}(x)={\frac {\log _{k}(x)}{\log _{k}(b)}}.\,}\) ,

Typical scientific calculators calculate the logarithms to bases 10 and \(e\).

Logarithms with respect to any base b can be determined using either of these two logarithms by the previous formula:

\(\qquad {\displaystyle \log _{b}(x)={\frac {\log _{10}(x)}{\log _{10}(b)}}={\frac {\log _{e}(x)}{\log _{e}(b)}}.\,}\)

Given a number \(x\) and its logarithm \(log_b(x)\) to an unknown base \(b\), the base is given by:

\(\qquad {\displaystyle b=x^{\frac {1}{\log _{b}(x)}}.}\)

heureka
Feb 23, 2017