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Distribution homework

  1. May 21, 2012 #1
    1. The problem statement, all variables and given/known data
    This is a calc problem but it's the algebra part I'm having trouble with:

    Screenshot2012-05-21at11120AM.png





    3. The attempt at a solution

    [16(1+h)2 - 16(1)2]/h

    [16 + 32h + 16h2 - 162]/h

    = 16/h + 32 + 16h - 162

    this is a calc problem so h approaches zero

    = 32 + 16h - 162

    = 16(h + 2) - 162

    I can't figure out why - 162 disappears.
     
    Last edited: May 21, 2012
  2. jcsd
  3. May 21, 2012 #2
    Re: distribution

    <deleted>
     
  4. May 21, 2012 #3
    Re: distribution

    What happened to that 16/h?? Surely, as h -> 0 16/h is -not- equal to 0.



    Try taking the 16 common out of the original expression, giving you

    [tex]\frac{16((1+h)^2-1)}{h}[/tex]

    Simplify this further, that should lead you to your answer.
     
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