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Homework Help: Need help solving the integral: (x^2)/(2^x)

  1. Jan 6, 2010 #1
    1. The problem statement, all variables and given/known data

    solve the integral ∫[(x^2)/(2^x)]dx evaluating from infinity to 0

    2. Relevant equations



    3. The attempt at a solution

    using integration by parts I get this: ([(ln(2)x]^2 + 2ln(2)x +2)/(2^x)[ln(2)]^3
    and a really big headache
     
  2. jcsd
  3. Jan 6, 2010 #2

    sylas

    User Avatar
    Science Advisor

    The headache will pass; and you earned it in a good cause. Your integration is correct.

    All you need now is to figure the limit as x goes to infinite, and the value when x is zero.

    Well done -- sylas
     
  4. Jan 6, 2010 #3
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