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Math Help - Non-real Integrals...

  1. #1
    MHF Contributor Also sprach Zarathustra's Avatar
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    Non-real Integrals...

    Check if the next non-real integral convergent without computing.

    int (1-->inf) e^(-sqrt(x))


    Thanks!
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    \int e^{-\sqrt x}dx=
    (x=t^2 \: \: dx=2tdt)
    =\int e^{-t}2tdt
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  3. #3
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    Quote Originally Posted by Also sprach Zarathustra View Post
    Check if the next non-real integral convergent without computing.

    int (1-->inf) e^(-sqrt(x))


    Thanks!
    In what sense is this "non-real"? Did you mean "improper integral"?
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  4. #4
    MHF Contributor Also sprach Zarathustra's Avatar
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    Quote Originally Posted by HallsofIvy View Post
    In what sense is this "non-real"? Did you mean "improper integral"?

    Yes, I'm translated this from Hebrew, sorry.
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    Quote Originally Posted by Also sprach Zarathustra View Post
    Yes, I'm translated this from Hebrew, sorry.
    Not a problem. My Hebrew (or just about any other language is far worse than your English, I am sure.
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