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What does '' mean in f''(x)?

  1. Mar 29, 2016 #1


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    Gold Member

    1. The problem statement, all variables and given/known data

    2. Relevant equations
    The Quotient rule for calculating the derivative.

    3. The attempt at a solution
    The derivative f'(x) = (x+5)-(x+3) / (x+5)^2
    I tried a previous similar problem but failed as I didn't and still don't know what '' means.
  2. jcsd
  3. Mar 29, 2016 #2


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    ##f''(x)## is the derivative of ##f'(x)##.
  4. Mar 29, 2016 #3
    f"(x) is the second derivative of f(x)
  5. Mar 29, 2016 #4


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    Thank you both.
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