Clarification

What should we do to find Max , Min points of inflection ?

Example :
Let consider f(x) = ((4 x)/e^(9 x)).
Find all minima, maxima, points of inflection,
and asymptotes.

The graph of f has an absolute maximum
at x =__________.

The graph of f has a point of inflection at x =_______

The graph of f has a __________ asymptote
with equation ___________

Thanks
Hussain