求证log(a^n)b=(1/n)logab

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求证log(a^n)b=(1/n)logab
求证log(a^n)b=(1/n)logab

求证log(a^n)b=(1/n)logab
log(a^n)b=loga b/loga a^n=loga b/n*1=(1/n)logab

log(a^n)b
=1/log(b)a^n
=1/[nlog(b)a]
=1/nlog(a)b

log(a^n,b)=lgb/lga^n=lgb/(nlga)=1/n*(lgb/lga)
=1/n*log(a,b)

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