How many points are not in the domain of the function?
None; the domain is . One Two Three Four More than four, but finitely
many Infinitely many
List the points that are not in the domain of the function.
(type the points with the smaller -values first. If two points have the same -value, type the one with the smaller -value first)
Note that the top piece is defined for all , and the bottom is undefined only when .
Since the bottom piece is defined only for where , we must find all points for
which:
From the first condition, we have , so substituting this into the second one gives
From this, or (list the smaller -value first).
Since , when , or (type the smaller -value in first).