Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: The last part of a integral

  1. Dec 16, 2006 #1

    ddr

    User Avatar

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

    4
    ∫ √x/(1+√x)
    0

    2. Relevant equations



    3. The attempt at a solution

    t=√x ; x=t^2 ; dx= 2t

    2
    ∫ (2t^2)/(1+t)
    0

    and now?
    thanx
     
  2. jcsd
  3. Dec 16, 2006 #2

    D H

    User Avatar
    Staff Emeritus
    Science Advisor

    Simplify your denominator with another substitution.
     
  4. Dec 16, 2006 #3
    Bring the 2 outside the integral and then add and subtract 1 in the numerator.
     
  5. Dec 18, 2006 #4

    dextercioby

    User Avatar
    Science Advisor
    Homework Helper

    First subtract and then add 1 in the numerator.

    Daniel.
     
  6. Dec 18, 2006 #5
    Hi ddr,

    Perform polynomial algebraic division and integrate the result directly.
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook