Normally, when
the function
takes on a value of
so the graph of
passes through the point (3, 3). This is the only place at which the cubic takes on a value of 3, since
is one-to-one.
In the definition of
, however, we remove this point from the curve and replace with the point (3, -2).
While
is a standard cubic function, so that its range is all real numbers, the replacement made for
removes 3 from the range set, so that the range of
would be all real numbers *except* 3.