数学y=log(3)x+4log(x)3怎么化成y=log(3)x+4/log(3)x?
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数学y=log(3)x+4log(x)3怎么化成y=log(3)x+4/log(3)x?
数学y=log(3)x+4log(x)3怎么化成y=log(3)x+4/log(3)x?
数学y=log(3)x+4log(x)3怎么化成y=log(3)x+4/log(3)x?
换底公式
loga(b)=logc(b)/logc(a) //括号内为真数
log(x)3=1/log(3)x
证明:
设log(x)3=y,得x^y=3
两边求以3为底的对数:
log(3)(x^y) = log(3)3 = 1
即 ylog(3)x=1 即 log(3)x=1/log(x)3
吃饭不反感和那个那个你奶奶个那个放你那个号你还能干活干活呢
y=log(3)x+4log(x)3用换底公式,其中log(x)3换成以3为底。即得y=log(3)x+4/log(3)x
y=log(3)x+4log(x)3
=log(3)x+4log(3)3/log(3)x
=log(3)x+4/log(3)x
公式log(x)y=1/log(y)x
同理:4log(X)y=4*log(x)y=4*1/log(y)x=4/log(y)x
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