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anonymous

  • 5 years ago

Does anybody know how to do complex integral substitution?

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  1. anonymous
    • 5 years ago
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    i do not know

  2. anonymous
    • 5 years ago
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    Some of the guys here are pretty good. Post question.

  3. anonymous
    • 5 years ago
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    Okay, thanks

  4. anonymous
    • 5 years ago
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    You welcome

  5. anonymous
    • 5 years ago
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    i give everyone medals

  6. anonymous
    • 5 years ago
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    \[\int\limits_{}^{}x ^{2}(x ^{3}+5)^{9} dx\]

  7. anonymous
    • 5 years ago
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    let u = x^3+5, so du = 3x^2dx the integral becomes\[(1/3)\int\limits_{}^{}u^9du\] then you integrate, so the final answer then is (1/30)(x^3+5)^10 + C

  8. anonymous
    • 5 years ago
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    Mika, this is a straight forward u-sub, the way you complex integral, I thought it was out of my league and didn't even attempt it.

  9. anonymous
    • 5 years ago
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    how could it possibly be out of your league Chagauna? I'm glad you agree on the answer though. I might be all bugged out telling him to let u be something like that. I'll bet Mika's dealling with integrals like that and those kinds of methods as we speak. I might as well just let him get the answer though, so he feels like he can take it all from there. I bet he does great. Thanks for the reinforcement.

  10. anonymous
    • 5 years ago
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    OK, I won't get intimidated next time someone say I have a 'complex' problem.

  11. anonymous
    • 5 years ago
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    But this is always a clue, Mika, the derivative of x^3+5 is 2x dx which is part of the question.

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