APFIVE Determining Concavity From the First Derivative
The function $$ f $$ has first derivative given by $$ f'(x) = x^4 - 6x^2 - 8x - 3 $$. On what intervals is the graph of $$ f $$ concave up?
A
$$ (0, \infty) $$
B
$$ (-\infty, -1) $$ and $$ (3, \infty) $$
C
$$ (-1, 2) $$
D
$$ (2, \infty) $$ only
Question Leaderboard
Not enough data yet to show leaderboard.