Question 35818: Express as a single logarithm: ln 8 - ln2
these kinda problems get on my nerves , help me please
Answer by rapaljer(4671)   (Show Source):
You can put this solution on YOUR website! There are three laws of logarithms, and you probably need to practice them backwards and forwards. If you need to get some extra explanations and examples, see my lesson plans in algebra.com under Logarithms, especially the ones that say "In Living Color". Those might be helpful to you.
REMEMBER that a LOGARITHM is LIKE an EXPONENT!! The Laws of Logarithms are like the Laws of Exponents!
Now,  Do you remember from the laws of exponents, when you multiply, you ADD EXPONENTS? Well, with logarithms, when you multiply, you add LOGARITHMS.
Likewise,  Do you remember from the laws of exponents, when you divide, you SUBTRACT EXPONENTS? Well, with logarithms, when you divide, you subtract LOGARITHMS.
As I said earlier, you have to know these backwards and forwards. This means sometimes you have to write it backwards:
Which brings us to your problem:
Did I just answer your question, or was that a Lesson Plan???
R^2 at SCC
|
|
|
