Logarithm #2

Jun 2010
4
0
Could someone please help me out :

I read this in a book just now:

3 log30 30/15 = 3 [1- log30 3 - log30 5]

Can someone show how this is possible (Nod)
 
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Sep 2008
1,261
539
West Malaysia
Could someone please help me out :

I read this in a book just now:

3 log30 30/15 = 3 [1- log30 3 - log30 5]

Can someone show how this is possible (Nod)
Just use the properties of log a few times .

3log 30/15=3(log 30-log 15)

then log 30=1 and log 15=log 5 + log 3

i meant log to the base 30.
 
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