The function is and interval is
.
Find the intercepts :
\To find the - intercept, substitute
in the function.
.
The -intercepts are
and
.
To find the -intercept, substitute
in the function.
.
The - intercept is
.
Find the relative extrema:
\The function is .
Apply derivative on each side with respect to .
To find the critical numbers by equating .
.
The solutions of are
and
in the interval
.
Thus, the critical points occur at and
.
If , then
.
If , then
.
The relative maximum is .
The relative minimum is .
Find the points of inflection :
\Consider .
Apply derivative on each side with respect to .
Find inflection points by equating .
Apply zero product property.
\ and
and
There is no real solutions of .
The solutions of are
in the interval
.
If , then
.
Thus, the inflection point is .
Find the asymptotes :
\The function is .
Vertical asymptote :
\The line is a vertical asymptote if
.
.
.
The vertical asymptotes are .
Horizontal asymptote :
\The line is a horizontal asymptote if
.
.
.
Therefore, there is no horizontal asymptote for the function .
Find intervals of increase or decrease :
\Consider the test intervals as and
\
Interval \ | \
Test Value | \Sign of ![]() | \
Sign of ![]() | \
Conclusion | \
![]() | \
![]() | \
\
| \
\
| \
\
Decreases \Concave up \ | \
![]() | \
![]() | \
![]() | \
\
| \
\
Increases \Concave up \ | \
![]() | \
![]() | \
![]() | \
\
| \
\
Increases \Concave down \ | \
![]() | \
![]() | \
\
| \
\
| \
Decreases, concave down | \
The function is in the interval
.
Graph :
\Graph the function in the interval
.
Observe the above two graph : The graphs represents the same function, i.e, .
Graph:
\Graph of the function in the interval
:
.