My book gives me the following notes/steps to sketching 1/f(x) from graph y=f(x):
(1) Find vertical asymptotes
(2) Horizontal asymptote is x-axis
(3) Find the common points when f(x) = + or - 1
(4) The graphs are in the same quadrant, that is, f(x)<0, 1/f(x)<0 and f(x)>0, 1/f(x)>0.
(5) If y...