若log3[log4(log5a)]=log4[log3(log5b)]=0,则a/b等于

问题描述:

若log3[log4(log5a)]=log4[log3(log5b)]=0,则a/b等于

log3[log3(log5a)]=0 log3(log5a)=1 log5a=3 a=625 log4[log4(log5b)]=0 log4(log5b)=1 log5b=4 b=125 所以 a/b=625/125=5 ..

log3[log4(log5a)]=log4[log3(log5b)]=0那么,对于log3[log4(log5a)]=0有 log4(log5a)=1因此 log5a=4a=5^4对于 log4[log3(log5b)]=0有 log3(log5b)=1因此 log5b=3b=5^3于是 a/b=5^4/5^3=5