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anonymous

  • 5 years ago

Help, Evaluating Intergrals using substitution prior to intergration by parts.

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  1. anonymous
    • 5 years ago
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    \[\int\limits e^\sqrt(3s+9)\]

  2. bahrom7893
    • 5 years ago
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    let a = 3s + 9, then da = 3ds then multiply and divide by 3, to get the 3*ds in da (1/3) Int(e^(sqrt(a)) da)

  3. anonymous
    • 5 years ago
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    but that's not going to help!

  4. bahrom7893
    • 5 years ago
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    yes it will

  5. bahrom7893
    • 5 years ago
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    \[\int\limits_{}^{}e^\sqrt{a}da\]

  6. bahrom7893
    • 5 years ago
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    (1/3) * \[\int\limits_{}^{}e^\sqrt{a}da\]

  7. anonymous
    • 5 years ago
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    what about the u & dv?

  8. bahrom7893
    • 5 years ago
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    now let b^2 = a

  9. bahrom7893
    • 5 years ago
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    da = 2b*db

  10. bahrom7893
    • 5 years ago
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    wait i got lost myself..

  11. bahrom7893
    • 5 years ago
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    hey there sorry i gtg now, but i found how to integrate e^sqrt(x) here: http://answers.yahoo.com/question/index?qid=20080903004829AAGDQnl GOOGLE WORKS WONDERS!!!

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