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Help Calculating Definite Integral

  1. Nov 11, 2011 #1

    realism877

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    1. The problem statement, all variables and given/known data

    (2(x)^2)/((x+1)((x)^2+1)) from 0 to 1







    The indefinite answer is (1/2)ln2+ln2-(pi/4)

    How did it get to this answer?(3/2)ln2-(pi/4)
     
    realism877, Nov 11, 2011
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  3. Nov 11, 2011 #2

    LCKurtz

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    Use partial fractions to write the integrand as
    [tex]\frac A {x+1}+\frac{Bx+C}{x^2+1}[/tex]
     
    LCKurtz, Nov 11, 2011
  4. Nov 11, 2011 #3

    realism877

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    I did that.

    I already have the solution. I'm just trying to figure out where the 3 came from.
     
    realism877, Nov 11, 2011
  5. Nov 11, 2011 #4

    LCKurtz

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    Oh my! I thought you had a calculus question about integrating. Instead you have an elementary algebra question. See if you can figure out how to combine like terms and make your answer agree with the given answer.
     
    LCKurtz, Nov 11, 2011
  6. Nov 11, 2011 #5

    Ivan92

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    What do you mean the indefinite answer? Where are the x's?

    You will need to show us your work in how you got to your answer. You might have made an error in your work.
     
    Ivan92, Nov 11, 2011
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