1. **State the problem:**
We are given the function $$h(x) = \frac{2x^2 - 7x + 3}{x^2 - x - 6}$$ and need to analyze its properties including intercepts, asymptotes, and intervals of increase and decrease.
2. **Factor numerator and denominator:**
Numerator: $$2x^2 - 7x + 3 = (2x - 1)(x - 3)$$
Denominator: $$x^2 - x - 6 = (x - 3)(x + 2)$$
3. **Simplify the function:**
$$h(x) = \frac{(2x - 1)(x - 3)}{(x - 3)(x + 2)}$$
Cancel common factor \(x - 3\):
$$h(x) = \frac{\cancel{(x - 3)}(2x - 1)}{\cancel{(x - 3)}(x + 2)} = \frac{2x - 1}{x + 2}, \quad x \neq 3$$
4. **Find vertical asymptotes (VA):**
Set denominator equal to zero:
$$x + 2 = 0 \implies x = -2$$
Note: \(x=3\) is a removable discontinuity (hole) since it was canceled.
5. **Find horizontal asymptote (HA):**
Since degrees of numerator and denominator are equal (both 1 after simplification), HA is ratio of leading coefficients:
$$HA = \frac{2}{1} = 2$$
6. **Find intercepts:**
- **y-intercept:** Evaluate \(h(0)\):
$$h(0) = \frac{2(0) - 1}{0 + 2} = \frac{-1}{2} = -\frac{1}{2}$$
- **x-intercept:** Set numerator equal to zero:
$$2x - 1 = 0 \implies x = \frac{1}{2}$$
7. **Intervals of increase and decrease:**
Since \(h(x) = \frac{2x - 1}{x + 2}\), find derivative:
$$h'(x) = \frac{(2)(x + 2) - (2x - 1)(1)}{(x + 2)^2} = \frac{2x + 4 - 2x + 1}{(x + 2)^2} = \frac{5}{(x + 2)^2}$$
Because \(5 > 0\) and denominator squared is always positive except at \(x = -2\) (vertical asymptote), \(h'(x) > 0\) for all \(x \neq -2\).
Therefore, \(h(x)\) is increasing on \(( -\infty, -2 )\) and \(( -2, \infty )\).
8. **Summary:**
- Vertical asymptote at \(x = -2\)
- Removable discontinuity (hole) at \(x = 3\)
- Horizontal asymptote at \(y = 2\)
- x-intercept at \(x = \frac{1}{2}\)
- y-intercept at \(y = -\frac{1}{2}\)
- Increasing on \(( -\infty, -2 ) \cup ( -2, \infty )\)
Rational Function Analysis Be7F54
Step-by-step solutions with LaTeX - clean, fast, and student-friendly.