Practice problem
Determine the interval(s) on which the function is concave up and concave down
f(x)=(13x)2−3f(x)=\begin{pmatrix}\dfrac13x\end{pmatrix}^2-3f(x)=(31x)2−3
Concave up x<0
Concave up x>0
Concave up (−∞,∞)(-\infty,\infty)(−∞,∞)
Concave down x<0
Concave down x>0
Concave down (−∞,∞)(-\infty,\infty)(−∞,∞)
Type a concept, like “slope” or “photosynthesis”.