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Math.....again...

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Old Mar 25, 2009 | 02:44 PM
  #31  
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Whered the x squared go....
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Old Mar 25, 2009 | 02:49 PM
  #32  
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Originally Posted by F22B Prelude
Whered the x squared go....
homey. You can't possibly be this bad... I gave you two separate posts showing you how it goes. I showed you the general rule AND I gave you the answer to your specific problem. I have no idea what else to do.
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Old Mar 25, 2009 | 02:51 PM
  #33  
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Oh, you took the x squared out and made it into a chain rule problem....I'm trying to solve it using the quotient rule or product rule...thanks for the help though
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Old Mar 25, 2009 | 02:55 PM
  #34  
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Originally Posted by F22B Prelude
Oh, you took the x squared out and made it into a chain rule problem....I'm trying to solve it using the quotient rule or product rule...thanks for the help though
No, I used the product rule.

Originally Posted by cpvdh
you mean chain rule, and yes same shit just different way
i would do it your way, i had to look up quotient rule always forget it h:
Actually it IS the product rule, not chain rule.
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Old Mar 25, 2009 | 02:57 PM
  #35  
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Still doesn't make any damn sense
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Old Mar 25, 2009 | 02:58 PM
  #36  
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Originally Posted by F22B Prelude
Still doesn't make any damn sense
can you solve the derivative for x^2?


Do the same process but now do it for x^(-2)
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Old Mar 25, 2009 | 02:59 PM
  #37  
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Originally Posted by Red X
No, I used the product rule.



Actually it IS the product rule, not chain rule.
its just a specific case of the chain rule, but i guess it gets its own name these days

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Old Mar 25, 2009 | 03:01 PM
  #38  
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Originally Posted by F22B Prelude
Still doesn't make any damn sense

whats the issue with the quotient rule i did?
caught up somewhere?


do you understand log and ln ok?

can you do other derivs like y=(x-2)/(3x^2+4x) with the quotient rule?
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Old Mar 25, 2009 | 03:41 PM
  #39  
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I got it now

I know the rules u'v + uv' = product and u'v - uv'/v2 = quotient

I was confused with (2) (ln) and then multiply that by (x^-2) i was thinking like (u)(v)(x) or some shit...but I got it figured out now..

You just keep (2ln(x+3) as U and (x^-2) as V...... then do the product rule
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Old Mar 25, 2009 | 03:47 PM
  #40  
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nice
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