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Math Help - Strange Integration Problem

  1. #1
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    Strange Integration Problem

    Hi, I'm doing a maths assignment and for part of I have to integrate a function that this segment is from.


    1/10x^2

    What is the procedure for doing that? Neither my textbook of tutoring sites have had examples that seem to be applicable for this function.
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  2. #2
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by Schermy View Post
    Hi, I'm doing a maths assignment and for part of I have to integrate a function that this segment is from.


    1/10x^2

    What is the procedure for doing that? Neither my textbook of tutoring sites have had examples that seem to be applicable for this function.
    please clarify, and use parentheses in the future.

    do you mean \frac 1{10}x^2 or \frac 1{10x^2} ?

    the first case is trivial, just apply the power rule: \int x^n~dx = \frac {x^{n + 1}}{n + 1} + C for n \ne -1

    the second case is also trivial, if you rewrite it. write it as \frac 1{10}x^{-2} and apply the power rule
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  3. #3
    Super Member 11rdc11's Avatar
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    I'm kind of confused by your question? Do you want to integrate ? If so the answer is is -1/(10x). Oops jhevon beat me to it.
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  4. #4
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    It was the former case and thanx very much for the answer, especially so promptly.
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  5. #5
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by Schermy View Post
    It was the former case and thanx very much for the answer, especially so promptly.
    so, what's your answer?
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  6. #6
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    \frac 1{10}x^3 ???
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  7. #7
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by Schermy View Post
    \frac 1{10}x^3 ???
    nope

    again, the rule is: \int x^n~dx = \frac {x^{n + 1}}{{\color{red}n + 1}} + C for n \ne -1
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  8. #8
    Super Member 11rdc11's Avatar
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    Try again it should be be  \frac{x^3}{30} + C do you see what you did wrong? oops I was to slow again.
    Last edited by 11rdc11; August 25th 2008 at 10:18 PM. Reason: to add my constant
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  9. #9
    is up to his old tricks again! Jhevon's Avatar
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    don't forget the + C guys

    sorry for being so fast 11rdc11
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  10. #10
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    <br />
\frac{1}{10} \frac {x^{3}}{{3}} + C<br />

    P.S. Still learning the maths markup
    Last edited by Schermy; August 23rd 2008 at 09:00 PM. Reason: syntax error
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  11. #11
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by Schermy View Post
    <br />
\frac {x^3}{3} + C<br />
    don't forget the 1/10 that was there before
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  12. #12
    Super Member 11rdc11's Avatar
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    Quote Originally Posted by Jhevon View Post
    don't forget the + C guys

    sorry for being so fast 11rdc11

    Lol thank you for reminding me to include my constant
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