Recent content by zxcv784

  1. Z

    What is the error in my integration by parts?

    D'uh...when x = 0, and you substiute it into x^n the result is 0...
  2. Z

    What is the error in my integration by parts?

    i don't think (because uv - -x = uv + x) so but could be wrong... even if they were all minuses when i subsitute x=1 into it i get -7679.54 which when divided by 7680 gives -0.999 which is still way off... any ideas?
  3. Z

    What is the error in my integration by parts?

    sorry there is an error in my first post... after the first integration stage i now get... -2x^5.exp(-x/2) -integral of -10x^4 . exp(-x/2) after continuing the integrations my final result is: -2x^5.exp(-x/2) - 20x^4.exp(-x/2) + 160x^3.exp(-x/2) - 960x^2.exp(-x/2) + 3840x.exp(-x/2) -...
  4. Z

    What is the error in my integration by parts?

    Hi, I am trying to integrate (x^5)/7680 . exp (-x/2) dx between 0 and 1. I've had various attempts at this and this is what i have done so far... Taken the 1/7680 outside the integration Using integation by parts I have assigned u=x^5 and dv/dx = exp(-x/2). when i integrate exp(-x/2) i...
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