The functions are
and
.
Consider
.
Apply derivative on each side with respect to
.

.
Consider
.
Apply derivative on each side with respect to
.

.
Consider the functions
and
.
Graph the functions
and
.
.gif\")
Observe the graph :
\As
tends to
, the function value of
approaches to
.
As
tends to
, the function value of
approaches to
.
By apply L
Hospital
s Rule:
.
Graph of the functions
and
is
.gif\")
As
tends to
, the function value of
approaches to
.
As
tends to
, the function value of
approaches to
.
.