Results 1 to 15 of 15

Math Help - Riemann sum

  1. #1
    Member
    Joined
    Jul 2009
    Posts
    127

    Riemann sum

    The following sum
    is a right Riemann sum for a certain definite integral
    using a partition of the interval into subintervals of equal length.
    Then the upper limit of integration must be: =
    and the integrand must be the function =

    can someone help me with this
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Grand Panjandrum
    Joined
    Nov 2005
    From
    someplace
    Posts
    14,972
    Thanks
    4
    Quote Originally Posted by dat1611 View Post
    The following sum
    is a right Riemann sum for a certain definite integral
    using a partition of the interval into subintervals of equal length.
    Then the upper limit of integration must be: =
    and the integrand must be the function =

    can someone help me with this
    Suppose b=4, then what?

    CB
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Member
    Joined
    Jul 2009
    Posts
    127
    im not really sure what would the integral be
    Follow Math Help Forum on Facebook and Google+

  4. #4
    MHF Contributor

    Joined
    Aug 2006
    Posts
    18,615
    Thanks
    1578
    Awards
    1
    What about \displaystyle \int\limits_1^4 {\frac{{dx}}<br />
{{1 + x}}}?
    Follow Math Help Forum on Facebook and Google+

  5. #5
    Member
    Joined
    Jul 2009
    Posts
    127
    im getting log(5/2) but that doesnt seem to be working
    Follow Math Help Forum on Facebook and Google+

  6. #6
    MHF Contributor

    Joined
    Aug 2006
    Posts
    18,615
    Thanks
    1578
    Awards
    1
    Try \displaystyle \ln\left(\frac{5}{2}\right)
    Follow Math Help Forum on Facebook and Google+

  7. #7
    Member
    Joined
    Jul 2009
    Posts
    127
    thats not right either
    Follow Math Help Forum on Facebook and Google+

  8. #8
    MHF Contributor

    Joined
    Aug 2006
    Posts
    18,615
    Thanks
    1578
    Awards
    1
    I think you will find that there is a mistake in the program.
    Follow Math Help Forum on Facebook and Google+

  9. #9
    Grand Panjandrum
    Joined
    Nov 2005
    From
    someplace
    Posts
    14,972
    Thanks
    4
    Quote Originally Posted by dat1611 View Post
    im getting log(5/2) but that doesnt seem to be working
    It is asking for the integrand not the integral, that is the function being integrated.

    CB
    Follow Math Help Forum on Facebook and Google+

  10. #10
    Member
    Joined
    Jul 2009
    Posts
    127
    i tried just 1/(1+x) but that not it either
    Follow Math Help Forum on Facebook and Google+

  11. #11
    MHF Contributor
    skeeter's Avatar
    Joined
    Jun 2008
    From
    North Texas
    Posts
    11,623
    Thanks
    428
    \displaystyle \int_1^4 \frac{1}{x} \, dx
    Follow Math Help Forum on Facebook and Google+

  12. #12
    Member
    Joined
    Jul 2009
    Posts
    127
    thats not right either i need the function but none of this is working
    Follow Math Help Forum on Facebook and Google+

  13. #13
    MHF Contributor
    skeeter's Avatar
    Joined
    Jun 2008
    From
    North Texas
    Posts
    11,623
    Thanks
    428
    Quote Originally Posted by dat1611 View Post
    thats not right either i need the function but none of this is working
    is this for some online answering system?
    Follow Math Help Forum on Facebook and Google+

  14. #14
    Member
    Joined
    Jul 2009
    Posts
    127
    yeah
    Follow Math Help Forum on Facebook and Google+

  15. #15
    Flow Master
    mr fantastic's Avatar
    Joined
    Dec 2007
    From
    Zeitgeist
    Posts
    16,948
    Thanks
    5
    Quote Originally Posted by dat1611 View Post
    yeah
    The function has the form \displaystyle f(x) = \frac{3}{a + x}. I will leave you the job of working out what the value of a is. I will also leave you the job of finding the value of b.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. HELP!!! Riemann sum
    Posted in the Calculus Forum
    Replies: 3
    Last Post: May 5th 2010, 05:11 PM
  2. Replies: 1
    Last Post: January 16th 2010, 02:31 AM
  3. Riemann Sum Help
    Posted in the Calculus Forum
    Replies: 2
    Last Post: April 18th 2009, 03:52 PM
  4. Replies: 6
    Last Post: August 4th 2007, 09:48 AM
  5. Riemann Sums and Riemann Integrals
    Posted in the Calculus Forum
    Replies: 1
    Last Post: October 1st 2006, 01:08 PM

Search Tags


/mathhelpforum @mathhelpforum