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Integration by substitution

  1. Nov 11, 2011 #1

    aub

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    can someone please explain to me the yellow area?

    206g4ue.jpg
     
  2. jcsd
  3. Nov 11, 2011 #2
    The first line sets up the substitution of u in place of [itex] \log _e (z) [/itex], the next line takes the derivative of each side and the final line rearranges for an expression for [itex] dz [/itex]; then these can be used to change the integrand :)
     
  4. Nov 15, 2011 #3

    aub

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    ok thanks
    did well on the exam btw :)
     
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