1
Q
log A + log B
A
= log (AB)
2
Q
log (A/B)
A
log A - log B
3
Q
log AB
A
B•log A
4
Q
log 1
A
0
5
Q
ln 1
A
0
6
Q
ln e
A
1
7
Q
ln ex
A
x
8
Q
eln x
A
x
9
Q
exlnb
A
bx
10
Q
logax
A
= logbx/logba
= ln x/ln a
