∵logaN=b→a^b=N
∴logmN=logm(a^b)
∴logmN/logma=logm(a^b)/logma
又∵logm(a^b)=b·logma
∴logmN/logma=b·logma/logma=b
即llogaN=logmN/logma=
∵logaN=b→a^b=N
∴logmN=logm(a^b)
∴logmN/logma=logm(a^b)/logma
又∵logm(a^b)=b·logma
∴logmN/logma=b·logma/logma=b
即llogaN=logmN/logma=