Results 1 to 3 of 3

Math Help - Evaluating the definite integral

  1. #1
    Newbie
    Joined
    Dec 2009
    Posts
    3

    Evaluating the definite integral

    Follow Math Help Forum on Facebook and Google+

  2. #2
    Master Of Puppets
    pickslides's Avatar
    Joined
    Sep 2008
    From
    Melbourne
    Posts
    5,236
    Thanks
    28
    Hi Diesel, it is preferred you post your attempts at each problem here at MHF.

    I am prepared to give you a hand by showing you a similar problem

    Consider the following integral \int_{-1}^3(2x+5)~dx

    Applying the rule \int x^n~dx = \frac{x^{n+1}}{n+1}+C

    We obtain \int_{-1}^3(2x+5)~dx = \left[x^2+5x\right]_{-1}^3

    Now to find the definite integral's value we say \left[3^2+5\times 3\right]-\left[{(-1)}^2+5\times (-1)\right]=\dots

    I'll let you take care of the arithmetic.

    And here's a hint for the second question

     \frac{3}{x^4} = 3x^{-4}
    Last edited by pickslides; December 17th 2009 at 10:02 PM. Reason: bad latex
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Newbie
    Joined
    Dec 2009
    Posts
    3
    hey man thanks a lot, thats exactly the kind of answer i was looking for, i can't thank you enough. i will now do these types well on the Final!!
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Evaluating integral (definite)
    Posted in the Calculus Forum
    Replies: 1
    Last Post: September 3rd 2011, 07:25 AM
  2. Evaluating a definite integral....
    Posted in the Calculus Forum
    Replies: 4
    Last Post: November 30th 2009, 10:16 AM
  3. Replies: 4
    Last Post: May 29th 2009, 04:21 AM
  4. Evaluating this definite integral
    Posted in the Calculus Forum
    Replies: 3
    Last Post: February 17th 2009, 06:33 PM
  5. Evaluating a definite integral
    Posted in the Calculus Forum
    Replies: 4
    Last Post: January 26th 2009, 07:20 PM

Search Tags


/mathhelpforum @mathhelpforum