1. **State the problem:** We need to sketch the graph of the function $$y=\frac{x^2 + 3x + 2}{x^2 - 1}$$ and understand its behavior.
2. **Identify the function and domain:** The function is a rational function where the numerator is $$x^2 + 3x + 2$$ and the denominator is $$x^2 - 1$$.
3. **Factor numerator and denominator:**
$$x^2 + 3x + 2 = (x+1)(x+2)$$
$$x^2 - 1 = (x-1)(x+1)$$
4. **Simplify the function:**
Since $$x+1$$ is common in numerator and denominator, for $$x \neq -1$$,
$$y = \frac{(x+1)(x+2)}{(x-1)(x+1)} = \frac{x+2}{x-1}$$
5. **Domain restrictions:**
The original denominator cannot be zero, so $$x \neq 1$$ and $$x \neq -1$$.
6. **Vertical asymptotes:**
At points where denominator is zero and not canceled, vertical asymptotes occur.
Here, at $$x=1$$ vertical asymptote.
At $$x=-1$$, the factor cancels, so there is a hole (removable discontinuity).
7. **Horizontal asymptote:**
Since degrees of numerator and denominator are equal (both degree 1 after simplification), horizontal asymptote is ratio of leading coefficients:
$$y = \frac{1}{1} = 1$$
8. **Find holes:**
At $$x=-1$$, hole exists. Find $$y$$ value at hole by limit or simplified function:
$$y = \frac{-1+2}{-1-1} = \frac{1}{-2} = -\frac{1}{2}$$
9. **Intercepts:**
- **x-intercept:** Set numerator zero:
$$x+2=0 \Rightarrow x=-2$$
- **y-intercept:** Set $$x=0$$:
$$y=\frac{0+2}{0-1} = \frac{2}{-1} = -2$$
10. **Summary:**
- Vertical asymptote at $$x=1$$
- Hole at $$(-1, -\frac{1}{2})$$
- Horizontal asymptote at $$y=1$$
- x-intercept at $$x=-2$$
- y-intercept at $$y=-2$$
This information helps sketch the graph accurately.
**Final answer:** The function simplifies to $$y=\frac{x+2}{x-1}$$ with a hole at $$x=-1$$ and vertical asymptote at $$x=1$$.
Rational Function Graph 7F8993
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