Take the derivative of
$y=(7+x)^{(7+x)^2}$
Derivative does not exist
At the point where , is increasing or decreasing, and is it concave up or down?
There is no concavity at that point.
Increasing, concave up
Decreasing, concave up
Decreasing, concave down
Increasing, concave down
, is 
increasing or decreasing, and is it concave up or down?