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Math Help - 3 Integral questions

  1. #1
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    Exclamation 3 Integral questions

    Hello,
    My homework is due very soon and Ive been attempting the problems but to be completly honest I have not put in the time and dont understand the basics. I cant afford to miss a homework and would greatly appreciate some help. Please understand that I will not just take your answers and never look at the problem again. I am looking to learn from your help. Thanks in advance.

    Evaluate the indefinite integral.

    Evaluate the indefinite integral.





    Evaluate the indefinite integral.

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  2. #2
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by xcelxp View Post
    Hello,
    My homework is due very soon and Ive been attempting the problems but to be completly honest I have not put in the time and dont understand the basics. I cant afford to miss a homework and would greatly appreciate some help. Please understand that I will not just take your answers and never look at the problem again. I am looking to learn from your help. Thanks in advance.

    Evaluate the indefinite integral.



    Here
    Attached Thumbnails Attached Thumbnails 3 Integral questions-int4.gif  
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  3. #3
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by xcelxp View Post


    Evaluate the indefinite integral.


    Here
    Attached Thumbnails Attached Thumbnails 3 Integral questions-int5.gif  
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  4. #4
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    Thank you very much, every bit helps!
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  5. #5
    is up to his old tricks again! Jhevon's Avatar
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    I'm rushing through these and am doing things while i'm doing it, so wait until i recheck them for errors before you copy them down. or better yet, you can check
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  6. #6
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    I just checked the 2nd one it and didnt work out.
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  7. #7
    is up to his old tricks again! Jhevon's Avatar
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    try the last one by yourself, if you get it wrong, i'll post the solution.

    Hint: you have to do it by substituion. use u=x^5 + 1
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  8. #8
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    sounds good, Ill post my work here. Give me a couple mins.
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  9. #9
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    Quote Originally Posted by xcelxp View Post
    I just checked the 2nd one it and didnt work out.
    there's nothing wrong with the second one, i checked myself. if you differentiate 5ln(ln(4x)) you get back 5/xln(4x). try it
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  10. #10
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    I get this far...then im stuck

    u=x^5+1
    Thus,
    u'=5x^4

    then
    int 1/u^2 du

    then what
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  11. #11
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    EnteredAnswer PreviewResult5*ln(ln(4*x))incorrect
    The answer above is NOT correct.

    Evaluate the indefinite integral.


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  12. #12
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    Quote Originally Posted by xcelxp View Post
    I get this far...then im stuck

    u=x^5+1
    Thus,
    u'=5x^4

    then
    int 1/u^2 du

    then what
    then you integrate that

    remember, 1/u^2 = u^-2, use the power rule

    you must be really tired huh?
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  13. #13
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    I had a 3.4 I swear
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  14. #14
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by xcelxp View Post
    EnteredAnswer PreviewResult5*ln(ln(4*x))incorrect
    The answer above is NOT correct.
    Evaluate the indefinite integral.


    what are you inputting the answer into?

    i assure you, that answer is not wrong. i've checked it myself, as well as checked it using maple AND The Integrator

    there is no way its wrong
    Last edited by Jhevon; April 3rd 2007 at 01:51 PM.
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  15. #15
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    I am entering this as my answer for the second one 5ln(ln(4x))

    and it is telling me the answer is incorrect
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