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OJK
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Math Help (Please! Urgent!)
#8346341 - 04/30/08 03:34 PM (16 years, 22 days ago) |
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Hey,
I have a third-year economics exam tomorrow and due to various reasons (my anxiety disorder which stops me from being able to concentrate/do work pretty much at all) I don't really know any math (in particular, differential calculus).
This image is typical of the type of differentiation required.
I know I'm in a bit of a fix, but all I need to do is pass this exam, so if anyone could show step-by-step how the below example works, I'd be really, really grateful.

Thanks
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relativexistance
"beads, bees!?!?beads ....BEADS!!!"


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Re: Math Help (Please! Urgent!) [Re: OJK]
#8346357 - 04/30/08 03:38 PM (16 years, 22 days ago) |
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you just do a partial derivatives with respect to p1 it looks like, as in you treat p2 as constant. as in do d/d(p1) to both sides
Edited by relativexistance (04/30/08 03:46 PM)
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OJK
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Re: Math Help (Please! Urgent!) [Re: OJK]
#8346359 - 04/30/08 03:39 PM (16 years, 22 days ago) |
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Even just describing what I need to do (e.g the names of the relevent rules etc.) would be a big help.
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TheCow
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Re: Math Help (Please! Urgent!) [Re: OJK]
#8346372 - 04/30/08 03:44 PM (16 years, 22 days ago) |
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Well, in terms of ease of explaining it, first just expand the terms out.
i.e (p1-8)(145.2-20p1+10p2) , multiply that through:
then youll have various terms like, some number, some number * p1, some number * p1^2, and some number * p1*p2.
You take the derivative of that which would be the following cases: just a number, derivative is 0
number * p1 = just that number
number * p1^2 = 2 times that number*p1
number*p1*p2 = number * p2
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Madtowntripper
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Re: Math Help (Please! Urgent!) [Re: TheCow]
#8346391 - 04/30/08 03:51 PM (16 years, 22 days ago) |
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Good Explanation.
-------------------- After one comes, through contact with it's administrators, no longer to cherish greatly the law as a remedy in abuses, then the bottle becomes a sovereign means of direct action. If you cannot throw it at least you can always drink out of it. - Ernest Hemingway If it is life that you feel you are missing I can tell you where to find it. In the law courts, in business, in government. There is nothing occurring in the streets. Nothing but a dumbshow composed of the helpless and the impotent. -Cormac MacCarthy He who learns must suffer. And even in our sleep pain that cannot forget falls drop by drop upon the heart, and in our own despair, against our will, comes wisdom to us by the awful grace of God. - Aeschylus
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OJK
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Re: Math Help (Please! Urgent!) [Re: TheCow]
#8346400 - 04/30/08 03:53 PM (16 years, 22 days ago) |
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HOLY SHIT
the fact that the step with expanding the brackets had been ommitted made me think some arcane rule was being used, when in fact it was just regular differentiation
thank you so much, I'm a freaking moron
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OJK
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Re: Math Help (Please! Urgent!) [Re: OJK]
#8346425 - 04/30/08 04:06 PM (16 years, 22 days ago) |
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Can anyone explain what's going on here?
I don't exactly know how to handle logs
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TheCow
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Re: Math Help (Please! Urgent!) [Re: OJK]
#8347053 - 04/30/08 07:13 PM (16 years, 22 days ago) |
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you gotta hit that product rule nigga derivative of ln(p) is 1/p
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johnm214



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Re: Math Help (Please! Urgent!) [Re: TheCow]
#8347329 - 04/30/08 08:21 PM (16 years, 22 days ago) |
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Quote:
TheCow said: you gotta hit that product rule nigga derivative of ln(p) is 1/p
yeah, this shit key for idiots like me
I always got stuck on stuff like that in my analytical/gen chem due to poor high school math knowledge.... Had only taken algebra and it fucked me up
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OJK
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Re: Math Help (Please! Urgent!) [Re: johnm214]
#8419531 - 05/19/08 09:48 AM (16 years, 3 days ago) |
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I passed

thanks a million guys
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