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!
Welcome to PF! Hi ahjukhir! Welcome to PF! (try using the X^{2} tag just above the Reply box ) Hint: there's a special trick for this … rewrite D^{-r/p} as (e^{ln(D)})^{-r/p} = e^{-(r/p)ln(D)}