${{\log }_{a}}1=0$


e.g. ${{\log }_{5}}1=0$, ${{\log }_{17.5}}1=0$, $\ln 1=0$


${{\log }_{a}}a=1$

e.g. ${{\log }_{11}}11=1$, ${{\log }_{20.5}}20.5=1$, $\ln e=1$

e.g. ${{\log }_{5}}1=0$, ${{\log }_{17.5}}1=0$, $\ln 1=0$




e.g. ${{\log }_{11}}11=1$, ${{\log }_{20.5}}20.5=1$, $\ln e=1$


Special Properties of Logarithm

Special Properties of Logarithm