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Homework Help: Simple Derivatives help

  1. Sep 8, 2010 #1
    Find f ' (2) given the following.
    g(2) = 3 , g ' (2) = -2
    h(2) = -1 , h ' (2) = 4

    a. f(x) = 2g(x) + h(x)
    b. f(x) = g(x) / h(x)
    c. f(x) = 4 - h(x)
    d. f(x) = g(x)*h(x)
     
  2. jcsd
  3. Sep 8, 2010 #2

    Mark44

    Staff: Mentor

    Re: Derivatives!!

    What have you tried. You have to show some work before we are allowed to give you help.
     
  4. Sep 8, 2010 #3
    Re: Derivatives!!

    I tried using lim(x->c) of f(x) - f(c) / x-c but i end up with lim (x->c) of (2g(x) + h(x) -5)/(x-2) for part (a) and i dont know where to go from there
     
  5. Sep 8, 2010 #4

    Mark44

    Staff: Mentor

    Re: Derivatives!!

    Don't you know any differentiation rules other than the limit definition? For example, the constant multiple rule, the sum rule, the product rule, the quotient rule?

    The limit definition of the derivative can be used, but it will be a pain for products, and especially quotients.
     
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