log 底数是4根号3 真数是81
问题描述:
log 底数是4根号3 真数是81
log4根号3 81 最好有分析!
答
log4根号3 81
=log4根号3 3的4次方
= log4根号3 4根号3的16次方
=16
或利用换底公式:
log4根号3 81
=lg81/lg4根号3
=4lg3/(1/4lg3)
=4/(1/4)
=16