Basic Integral Question

  • Thread starter undrcvrbro
  • Start date
  • #1
undrcvrbro
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Homework Statement


Find the indefinite integral using substitution:
[tex]\int[/tex]e^2x(1+e^2x)^3 dx

Homework Equations





The Attempt at a Solution


I'm not sure how to start. What do I substitute? Any suggestions to get me started will be greatly appreciated.
 

Answers and Replies

  • #2
m_s_a
91
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put u=e^2x====>du=2e^2xdx
 
  • #3
Dick
Science Advisor
Homework Helper
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Better to put u=(1+e^(2x)).
 
  • #4
undrcvrbro
132
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Better to put u=(1+e^(2x)).

Yes, thanks dick. Thats what I ended up doing. I had just learned this stuff today, so I think msa's approach may have been a bit over my head.
 

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