anonymous
  • anonymous
Given f(x)=2-(x^3/6)-x^2. On what interval(s) is the graph of f concave upwards? The derivative is (-x^2/2)-2x but do I set that equal to 0?
Mathematics
katieb
  • katieb
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anonymous
  • anonymous
Okay well to find concavity you have to work with the second derivative of the function, so I would take the derivative of (-x^2/2)-2x and then set that equal to 0. Then the values that you get you would put in a sign analysis. Concave up is when the second derivative is increasing.
anonymous
  • anonymous
Now I remember. Thank you.

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