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Homework Help: Stuck with Differentiation halfway

  1. Sep 18, 2011 #1
    1. The problem statement, all variables and given/known data

    I'm stuck halfway in my differentiation.

    The question is:
    Suppose f(x) is the following function when x > 0, find the x-coordinate of the critical point of f(x).

    2. Relevant equations

    Equation = f(x) = e^x - 5x^2 - ln(x)

    3. The attempt at a solution

    I solved for: f'(x) = e^x - 10x - 1/x

    From here on, I'm stuck. Help please?
    Thank you! =)
  2. jcsd
  3. Sep 18, 2011 #2


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    Do you know bisection method? Newton's method?
  4. Sep 18, 2011 #3
    I'm afraid I don't. I'm very weak in Calculus, sorry!
  5. Sep 24, 2011 #4
    Do you know how I can solve this?
    or where I can find a good explanation?

    Thank you! =)
  6. Sep 24, 2011 #5


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