Im pretty sure its A, but dont count on me!!! i hope it helps :/
<span>Inflection points are where the function changes concavity. Since concave up corresponds to a positive second derivative and concave down corresponds to a negative second derivative, then when the function changes from concave up to concave down (or vise versa) the second derivative must equal zero at that point. So the second derivative must equal zero to be an inflection point. But don't get excited yet. You have to make sure that the concavity actually changes at that point.</span>
X=5
Do you need an explanation or is the answer enough?
Answer:
you got there answer correct
Step-by-step explanation:
the lines all follow the answer
