What am I doing wrong here?
x pǝɹ
Joined: Feb 2003
Posts: 6,246
Likes: 1
From: Upstate
bah, nooooooooo
you cant break the ln(a + b) into ln(a) + ln (b) that is not correct!!!!
you are thinking of ln(ab)=ln(a) + ln(b)
multiplication changes to addition, division changes to subtraction
http://www.mathwords.com/l/logarithm_rules.htm
for all rules
wait, thats not even quite what you are doing
whatever it is, line 2 is not correct from line 1
you cant split the ln(a+b) into anything else its in its basic form
you cant break the ln(a + b) into ln(a) + ln (b) that is not correct!!!!
you are thinking of ln(ab)=ln(a) + ln(b)
multiplication changes to addition, division changes to subtraction
http://www.mathwords.com/l/logarithm_rules.htm
for all rules
wait, thats not even quite what you are doing
whatever it is, line 2 is not correct from line 1
you cant split the ln(a+b) into anything else its in its basic form
Sure, you can factor out the x^2!
I did this ( ln(x^2(x^2+5) ). The answer is fine the way it is.
Last edited by Red X; Mar 17, 2009 at 03:56 PM.
Member
Joined: Feb 2006
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From: OR
x pǝɹ
Joined: Feb 2003
Posts: 6,246
Likes: 1
From: Upstate
That would be a noob mistake, like the chain rule derivation I made earlier
. Its been 6 years since I have done non-specific derivatives 
I like being refreshed. I spend too much time involved on specific problems ftl.
Last edited by Red X; Mar 17, 2009 at 04:04 PM.
Member
Joined: Feb 2006
Posts: 1,869
Likes: 0
From: OR
yeah, i havent touched this stuff in quite a while, calc was in like 2001 i think
and after that it was mostly theory, didnt touch a derivative until i worked at a comm.col. and then it was the rarity since they only offered the first calc class
i cant even understand my gf when she talks about her grad school crap :thinking:
i miss math, good times