I have a function f(x) = sqrt(0.5*x^2 + 4) - 2 I calculate the first derivative and get f'(x) = x / sqrt(0.5x^2 + 4) But I have a hard time trying to figure out the second derivative f''(x). How do I proceed?
Last edited by Tikitac; Oct 13th 2007 at 08:13 AM.
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Originally Posted by Tikitac I have a function f(x) = sqrt(0.5*x^2 + 4) - 2 I calculate the first derivative and get f'(x) = 2x / sqrt(0.5x^2 + 4) But I have a hard time trying to figure out the second derivative f''(x). How do I proceed? Well, your first derivative isn't right anyway. Here's a helpful hint: Use fractions, it's a little clearer that way. So Now to "pretty" this up a bit: For your second derivative, use the quotient rule: The typical ways to write this would be or -Dan
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