Chapter 4.3, Problem 25AYU

In Problems 7-50, follow Steps 1 through 7 on page 234 to analyze the graph of each function.

$F\left(x\right)=\frac{x^2-3x-4}{x+2}$

To determine

To find: Ananlyze the given function.

Answer to Problem 25AYU

Explanation of Solution

Given:

$F\left(x\right) = \frac{x^2 - 3x - 4}{x + 2}$

Step 1: Factor $F$ to get

$F\left(x\right) = \frac{x^2 - 3x - 4}{x + 2}$

$F\left(x\right) = \frac{\left(x - 4\right)\left(x + 1\right)}{x + 2}$

That is $x = -2$

The domain $\left\{x\text{|}x \ne -2\right\}$

Step 2: $F$ is in lowest terms.

Step 3: Locate the intercepts of the graph. Use multiplicity to determine the bahaviour of the graph of $F$ at each $x\text{-intercept}$.

$y\text{-intercept}$ $-2$.

$x\text{-intercept}$ is 4 and $-1$.

Step 4: Locate the vertical asymptotes. Determine the behaviour of the graph on either side of each vertical asymptote.

$x = -2$

Step 5: Locate the horizontal or oblique asymptote. Determine points, if any, at which the graph of $F$ intersects this asymptote.

Here horizontal asymptote $y = x - 5$, not intersected.

Step 6: Graph $F$ using a graphing utility.

Step 7: