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Derivative with respect to a variable

by ahjukhir
Tags: derivative
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ahjukhir
#1
Sep6-09, 03:22 PM
P: 1
little rusty with my derivatives...

Question derive Eo with respect to r
En = -C/r + D^(-r/p)

C,D and p are all constants...

so far I have Eo = -Cr^-2 .. but then im not sure about the exponential.

any help would be appreciated.
Thanks!
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tiny-tim
#2
Sep6-09, 04:08 PM
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tiny-tim's Avatar
P: 26,160
Hi ahjukhir! Welcome to PF!

(try using the X2 tag just above the Reply box )

Hint: there's a special trick for this rewrite D-r/p as (eln(D))-r/p = e-(r/p)ln(D)


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