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A few homework problems

  1. Jul 28, 2007 #1
    1. The problem statement, all variables and given/known data
    Evaluate the integral 3x^2e^xdx



    3. The attempt at a solution

    I used integration by parts twice and came up with:

    3x^2e^x-6xe^x+6e^x+C

    Does that look correct.


    Another question ask for a divergent series whose terms go to 0.
    The harmonic series 1/n (with infinity on top of summation and n=1 on bottom) fits that criteria correct?
     
  2. jcsd
  3. Jul 28, 2007 #2
    1. google the integrator and check
    2. yes you are correct
     
  4. Jul 28, 2007 #3

    HallsofIvy

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    Even more simply, differentiate (3x2- 6x+ 6)ex+ C and see what you get!
     
  5. Jul 28, 2007 #4
    Last edited: Jul 28, 2007
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