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

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

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