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chenonceau
chenonceau aka Kelly is a 19.47 year old girl, has been a member since December 1, 2005, has scored 720 submissions, giving an average score of 2.19.
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  Dec 29 '06 by chenonceau        16 Comments        Watch this      Share:  Share on facebook    Share on delicious    Share on digg    Share on MySpace    Tweet this    Stumble this    Share this on Kaboodle   
Help me evaluate the integral?
Can someone please explain to me why the answer to the the following problem is ln 3?


Stevethegreat
Stevethegreat on Dec 29 '06 at 11:56pm
because the integral of dx/x is ln x
Stevethegreat
Stevethegreat on Dec 29 '06 at 11:57pm
move the 1/2 out of the integral sign
margolove
margolove on Dec 29 '06 at 11:57pm
awh.. I wish I could help you. We're just about to start integration :/
Stevethegreat
Stevethegreat on Dec 29 '06 at 11:57pm
it's 1/2(ln 9-ln 1)
Stevethegreat
Stevethegreat on Dec 29 '06 at 11:57pm
which doesn't seem to be ln 3
Stevethegreat
Stevethegreat on Dec 30 '06 at 12:01am
wait.

I did ti wrong
chenonceau
chenonceau on Dec 30 '06 at 12:01am
Umm... hm.

Well, the back of my book says "ln 3".

Ah! :(
Stevethegreat
Stevethegreat on Dec 30 '06 at 12:02am
you'll get
x/2 ln x
realslimnatey
realslimnatey on Dec 30 '06 at 12:02am
I know my calculus,

it says you + me = us
Stevethegreat
Stevethegreat on Dec 30 '06 at 12:03am
I think

and then 9/2 ln 9 - (1/2 ln1)
goldensara
goldensara on Dec 30 '06 at 12:04am
I wish I could help you but my brain blocked the trauma of Calculus a long time ago :(

Steve sounds like he knows his stuff!
Stevethegreat
Stevethegreat on Dec 30 '06 at 12:04am
1/2 ln x
Stevethegreat
Stevethegreat on Dec 30 '06 at 12:06am
man I suck at this
Stevethegreat
Stevethegreat on Dec 30 '06 at 12:06am
I did get it right though
chenonceau
chenonceau on Dec 30 '06 at 12:07am
Hm.

I'm going to digest this and see if I get it.

Thanks Steve! :)

*hug*
Stevethegreat
Stevethegreat on Dec 30 '06 at 12:11am
yeah


I don't see how that comes to ln 3 though


but I really know nothing about logs and such
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