The second derivative test doesn't apply because $\displaystyle f"(c)$ has to be < or > for there to be a max or a min $\displaystyle ->$ option 3. So based on them counting it wrong, there could be a max or min? How could that be?
The second derivative test doesn't apply because $\displaystyle f"(c)$ has to be < or > for there to be a max or a min $\displaystyle ->$ option 3. So based on them counting it wrong, there could be a max or min? How could that be?