\
The function is .
(A)
\Domain :
\The function is .
All possible values of is the domain of the function.
Denominator of the function should not be zero
\The domain of the function is
.
\
(B)
\Intercepts :
\There is no -intercept, since
is not in the domain.
To find the -intercepts, substitute
in the function.
Therefore the -intercept is
.
\
(C)
\Symmetry :
\Substitute in the function.
.
.
Therefore the function is neither odd nor even.
\
(D)
\Asymptotes :
\Horizontal asymptote :
\Therefore the horizontal asymptote is .
Vertical asymptote :
\Vertical asymptote appears when the function is not defined.
\Therefore the vertical asymptote is .
\
(E)
\Intervals of increase or decrease :
\The function is .
Differentiate on each side with respect to .
.
Find critical points by equating .
.
Test intervals are based on and where
is undefined.
Test intervals are ,
and
.
\
Interval \ | \
Test Value | \Sign of ![]() | \
Conclusion | \
![]() | \
![]() | \
\
| \
Decreasing | \
![]() | \
![]() | \
\
| \
\
\ Increasing \ | \
![]() | \
![]() | \
\
| \
Decreasing | \
The graph is increasing in the interval .
The graph is decreasing in the interval ,
.
\
(F)
\Local Maximum and Minimum values :
\The function has a local maximum at
, because
changes its sign from positive to negative.
Substitute in
.
.
Local maximum is .
At , there is an vertical asymptote, so we donot consider local minimum at
.
\
(G)
\Concavity and point of inflection :
\.
Differentiate on each side with respect to
.
.
Find inflection points by equating to zero.
.
At ,
.
Inflection point is .
But at , the function is undefined,hence consider those points also.
Split the intervals into ,
and
.
\
Interval \ | \
Test Value | \Sign of ![]() | \
Concavity | \
![]() | \
![]() | \
\
| \
Down | \
![]() | \
![]() | \
\
| \
\
\ Down \ | \
![]() | \
![]() | \
\
| \
Up | \
The graph is concave up in the interval .
The graph is concave down in the interval and
.
\
(H)
\Graph :
\Graph of the function :
\
(A) The domain of the function is
.
(B) No -intercept, and
-intercept is
.
(C) No symmetry.
\(D) The horizontal asymptote is and the vertical asymptote is
.
(E)
\The graph is increasing in the interval .
The graph is decreasing in the interval ,
.
(F)
\Local maximum is .
(G)
\The graph is concave up in the interval .
The graph is concave down in the interval and
.
Inflection point is .
(H) Graph of the function is
.