alrighty well the beginning of this week i was pretty excited because i actually understand logs. If anyone needs help with logs just ask!!!
the log properties are pretty easy to understand and remember because they are basically the same as properties of exponents.
expanding logs:
logbMN^2 = logbM+2logN..... when expanding, the exponent always goes in front of the log.
condensing logs:
log 45-2 log 3= log (45/9)= log 5... 3 to the 2nd power is 9...thats where the 9 came from.
write y in terms of x if lny= 1/3lnx+ln4:
lny=ln4x^1/3....always put the number in front of the log or ln as the exponent and combine the other terms.
condensing and expanding logs with symbols is the exact same so dont freak out when you see symbols!!!
remember positive terms are the numerator and negative terms are the denominator of the fraction.
I could use some help with the word problems where you use the formulas we took notes on in class on thursday!
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For the word problems all you really do is first of all: study and memorize the notes we took. Then in the problem you look for key words that might be in the notes, this is how you figure out which formula to use. Once you figure out which one you use you just plug everything in.
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