Log log log log log

這不應該在化學吧- -

log好似sin cos tan果d，稱之為函數。
函數的特徵為: If x=y , f(x)=f(y)
但是f(x)≠ x
f代表所有函數(function).

每個函數皆有其公式，例如
x=y
log x=log y
如果 x=a^b ; y=p^q
log a^b=log p^q
則
b log a=q log p
格式為:指數1 log底數1 = 指數2 log底數2

例子:
2^x=8
log 2^x=log 8
x log 2=log 8
x=log 8/ log 2=3

3^x=7
log 3^x=log 7
x log 3=log 7
x=log 7/ log 3=1.771243749...

由此可見
a^b=c
b log a=log c
b=log c / log a
通常b(log c / log a) 會寫成
b=log c a為b的底數，c為a^b的ans.
a

The logarithm of a number is the exponent by which another fixed value , the base , has to be raised to produce that number .
log 1000= 3 , the logarithm of 1000 to the base 10 is 3 , 1000=10power3 =10x10x10 .

Why f(x) cannot equal x?