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Evaluate the integral?

  1. Aug 9, 2010 #1
    41) ∫ (xdx) / (7x^2 + 3)^5

    42) ∫ (sint) / (3 + cos t)^3 dt


    how do i solve this? i have no idea where to start...can you have a step by step process/analysis on how to figure out the answer? thanks!
     
  2. jcsd
  3. Aug 9, 2010 #2

    mathman

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    Substitution:
    41) u=x2
    42) u=cos t
     
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