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I have a test today on logarithms and I dont know how to do it at all HELP ME PLEASE!

i need to know the basics 
 
 
adding logs subtracting logs all that good stuff
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1 Answer

Let "a" , "b" , and  "c"  be numbers
 
 
log(a) + log(b) = log(ab)
 
log(a) - log(b) = log(a / b)
 
log(a) + log(b) - log(c) = log[(ab / c)]
 
 
Whenever you see a positive log term, the argument of that log term goes in the numerator.
Whenever you see a negative log term, the argument of that log goes in the denominator.

Comments

May I add: log(ax) = x log (a)?