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Math Help - Can someone help me find the antiderivatives, please?

  1. #1
    Newbie
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    Apr 2009
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    3

    Can someone help me find the antiderivatives, please?

    I am stuck on how to find the antiderivatives for the following problems:

    1. ∫(4x-5/x^2)dx (For this I got 2x^2 + 5/2x^2+c, does that sound ok?)
    2. ∫3x/(x^2+4)^5 dx (I got 3/2 ln (x^2+4)+c)
    3. ∫5xsec^2(x^2)dx
    4. ∫(4x-5/x^2)dx
    5. ∫e^4x dx
    6. ∫sin(x)cos^3(x) dx

    Can someone possibly give me the correct answers for these and some guidance on how to do them? Any help on any of these is greatly appreciated, thanks!
    Last edited by anitah; May 5th 2009 at 12:44 PM.
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  2. #2
    MHF Contributor
    Joined
    Oct 2005
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    Earth
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    Hi there,

    There are a couple things you should change to get better help here. First, one problem per thread please and second, show all attempted work so we know you have tried.

    So pick one to start with and show us where you get stuck.
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