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Having trouble with differential and linear approximation

  1. Aug 6, 2012 #1
    f(x)=x^3/2 with x=4 and deltax=dx=0.1 calculate deltay and dy

    I got 0.4 for dy but its wrong, and i cant find deltay. plz help!!! thxs
     
  2. jcsd
  3. Aug 6, 2012 #2

    LCKurtz

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    Show us your work and we will help you fix your mistake.
     
  4. Aug 7, 2012 #3
    In your post, do you mean [itex]x\sqrt{x}[/itex] or [itex]\dfrac{x^3}{2}[/itex] by x^3/2?
     
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