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I Derivation of a formula

  1. Dec 3, 2017 #1
    Would someone explain the last step in eq.(2.34) in Heald and Marion?
    Much thanks ahead.

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  3. Dec 3, 2017 #2


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    You've a far better chance of getting assistance if you upload the relevant page. Not everyone will have that book.
  4. Dec 4, 2017 #3


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    Well, that's simply working out the derivatives. It's just a bit of algebra!
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