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    Dark Flame99966
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    Logs

    Post by Dark Flame99966 on Wed Nov 17, 2010 10:53 pm

    Can anyone teach my logarithms? My algebra 2 class last year failed to teach me logs and conics (except for parabolas) which I'll need to know for precalc next year.

    Sooo, yeah.


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    Re: Logs

    Post by Doc on Wed Nov 17, 2010 10:56 pm

    i forgot myself and I need to know this crap for PCAT

    wheres ahmed lol
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    Ahmed
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    Re: Logs

    Post by Ahmed on Wed Nov 17, 2010 11:37 pm

    Yeah what about logs? There are so many topics for logs.


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    Re: Logs

    Post by Dark Flame99966 on Thu Nov 18, 2010 12:03 am

    I...don't know? What did you learn in algebra 2 before precalc?


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    Re: Logs

    Post by Ahmed on Thu Nov 18, 2010 12:05 am

    Well at my school we took Algebra II/Trigonometry. That's when I took all the log related stuff.

    http://en.wikipedia.org/wiki/Mathematics_education_in_New_York#Algebra_II.2FTrigonometry


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    The Banker
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    Re: Logs

    Post by The Banker on 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= kloga(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 :S
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    Re: Logs

    Post by Coolmeia on Thu Nov 18, 2010 7:36 pm

    argggg my head is gonna explode!
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    Re: Logs

    Post by Dark Flame99966 on Thu Nov 18, 2010 8:52 pm

    Err, what's base?


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    Re: Logs

    Post by Ahmed on Thu Nov 18, 2010 9:14 pm

    log10100=2

    10=base


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    Re: Logs

    Post by Doc on Thu Nov 18, 2010 9:51 pm

    its just a fancy way to write an exponent ...

    for example:

    log 5 25 = 2

    is the same as 5^2 = 25

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    Re: Logs

    Post by Coolmeia on Thu Nov 18, 2010 10:00 pm

    lol havn't learned it yet... wait, did you say its in algebra 1? uh oh it might be coming up soon for me then...
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    Re: Logs

    Post by Ahmed on Thu Nov 18, 2010 10:02 pm

    Algebra 2


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    Re: Logs

    Post by Coolmeia on Thu Nov 18, 2010 10:05 pm

    thank goodness another 2 years until that...
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    Re: Logs

    Post by Craig on Fri Nov 19, 2010 9:01 am

    Algerbra is EASY, I learned it in eigth grade, and I'm the top of my math class.
    It's SIMPLE like a pie.
    It's as easy as solving equations!
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    Re: Logs

    Post by preid1220 on Fri Nov 19, 2010 1:05 pm

    Mayhem wrote:Algerbra is EASY, I learned it in eigth grade, and I'm the top of my math class.
    It's SIMPLE like a pie.
    It's as easy as solving equations!

    you'll just love alg/trig


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    Re: Logs

    Post by Coolmeia on Fri Nov 19, 2010 7:35 pm

    I'M IN 7TH GRADE AND IM DOING ALGEBRA 1! haha im smarticle
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    Re: Logs

    Post by Coolmeia on Fri Nov 19, 2010 7:37 pm

    i cant wait for next year. when im in eight grade i can take drivers training xD
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    Re: Logs

    Post by Ace on Fri Nov 19, 2010 7:39 pm

    I'm in drivers ed right now. Very Happy


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    Re: Logs

    Post by Doc on Fri Nov 19, 2010 8:08 pm

    noob!

    be a real man and learn with ur parents
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    Re: Logs

    Post by Dark Flame99966 on Fri Nov 19, 2010 8:08 pm

    1. Don't get off topic
    2. We don't care what you're taking right now, this topic is so I can actually learn about logs


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    Re: Logs

    Post by Doc on Fri Nov 19, 2010 8:12 pm

    dude read the book .. ur not gonna learn logs on an internet forum with people like ahmed lol ...
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    Re: Logs

    Post by Coolmeia on Fri Nov 19, 2010 8:53 pm

    sorry im the queen of spam and offtopicness
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    Re: Logs

    Post by Ahmed on Fri Nov 19, 2010 9:15 pm

    What else do you want to know flame?


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    Re: Logs

    Post by Dark Flame99966 on Fri Nov 19, 2010 10:01 pm

    I don't have a book atm :L

    Using it in equations I guess?


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    Re: Logs

    Post by Ahmed on Fri Nov 19, 2010 10:16 pm

    Marwa wrote for you all the equations.


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