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Homework Help: Finite Difference

  1. Sep 15, 2006 #1

    Meh

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    Hello there...I'm currently stuck with a problem regarding finite differences. The question asks for me to come up with an equation to find the constant of the finite difference. An example would be...Let's take the equation y=10x^4 and the constant is 240. Any hints as to where to start or anyone feeling generous enough to just give me the equation? o:)
     
  2. jcsd
  3. Sep 15, 2006 #2

    0rthodontist

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    well, I don't have any proof of this in hand but you could notice that
    10 * 4 * 3 * 2 * 1 = 240
     
  4. Sep 15, 2006 #3

    HallsofIvy

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    I think what you are doing is finding repeated differences:

    x f(x) [itex]\Delta x[/itex] [itex]\Delta^2 x[/itex]
    1 10 150
    2 160 640
    3 810 1750 1940
    4 2560 3690
    5 6250
     
  5. Sep 17, 2006 #4

    Meh

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    Thank Orthodontist and HallsofIvy, I think Ortho is on the right track...Still having a problem with coming up with an equation.
     
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