M3. 120 Fall ZUlb bxam l 3
Part I. Short Answer. On these problems, write your answer in the space below
the problem. Only the answer will be graded, and there is no partial credit. Each
problem is worth three (3) points.
The rst two problems refer to the
Explain what it
means to say that
l1m f(x) = 9 and
lim f(x) = I.
x . 2x-2+
As x approaches 2, f(x) approaches
!, but f(2) = 9.
As x approaches 2, f(x) approaches 9, but f(2) = I.
As x approaches 2 from the left, f(x) approaches 9. As x