求证 log(a)^(b)=1/log(b)^(a)求证 log(a)^(b)=1/log(b)^(a)
问题描述:
求证 log(a)^(b)=1/log(b)^(a)
求证 log(a)^(b)=1/log(b)^(a)
答
换底公式:loga b = logb b /log b a = 1 /log b a