已知lg2=0.301,lg3=0.477,求log(5)0.5
问题描述:
已知lg2=0.301,lg3=0.477,求log(5)0.5
(5)是log的下标
答
log(5)0.5=-log(5)2=-lg2/lg5=-lg2/(1-lg2)=-0.301/0.699=-0.431
已知lg2=0.301,lg3=0.477,求log(5)0.5
(5)是log的下标
log(5)0.5=-log(5)2=-lg2/lg5=-lg2/(1-lg2)=-0.301/0.699=-0.431