Question
2 Sketch the graph of h(x) of [ (x^2+5 x+6)/(x+1) ]
Solution
4.7
(185 Votos)
Olivia Maria
Mestre · Tutor por 5 anos
Resposta
To sketch the graph of \( h(x) = \frac{x^2 + 5x + 6}{x + 1} \), we need to analyze the function's behavior, including its domain, intercepts, asymptotes, and general shape.### Step-by-Step Analysis:1. **Factor the Numerator:**
So, the function simplifies to:
2. **Domain:** The function is undefined where the denominator is zero. Therefore, the domain is:
3. **Intercepts:** - **x-intercepts:** Set the numerator equal to zero:
So, the x-intercepts are at
and
. - **y-intercept:** Set
:
So, the y-intercept is at
.4. **Asymptotes:** - **Vertical Asymptote:** The function is undefined at
, so there is a vertical asymptote at
. - **Horizontal Asymptote:** For large values of
, the term
dominates, so:
However, since the degree of the numerator is greater than the degree of the denominator, there is no horizontal asymptote. Instead, there is an oblique asymptote given by the quotient:
5. **Behavior Near Asymptotes:** - As
, \( h(x) \to +\infty \). - As
, \( h(x) \to -\infty \).6. **Plotting Points:** Choose a few points to plot the graph accurately: -
:
-
:
-
:
### Graph Sketch:1. Draw the vertical asymptote at
.2. Plot the x-intercepts at
and
.3. Plot the y-intercept at
.4. Draw the oblique asymptote
.5. Sketch the curve approaching the vertical asymptote as
and the oblique asymptote as
.Here is a rough sketch of the graph:```y|| /| /| /| /| /| /| /| /| /| / |/_________________________ x-3 -2 -1 0 1 2 3```In this sketch:- The vertical line at
represents the vertical asymptote.- The line
represents the oblique asymptote.- The points \( (-2,