by The Banker Thu Nov 18, 2010 10:07 am
i can tell u all i know about logs (its not very much BTW)
>>
loga(base)n=x means that a^x=n
>>
*
loga(base)1=0
*
loga(base)a=1
>>
log10(base)x is sometimes written as
logx
>> The laws of logarithms are:
*
loga(base)xy=
loga(base)x+
loga(base)y .... the multiplication rule
*
loga(base)x/y=
loga(base)x-
loga(base)y .... the division law
*
loga(base)x^k= k
loga(base)x .... the power law
these are very similar to the indices laws >> From the power law,
loga(base)1/x=-
loga(base)x
>> to change a base of a log:-
*
loga(base)x=
logb(base)x/
logb(base)a ... where b is the base u wanna change it to
>> from the changing the base rule....
loga(base)b=1/
logb(base)a
>> Then of course u have
ln and
e... but i'm not sure if u need to know 'em or not
meh, hope i helped