Graph Function 96Bb9B
1. **Stating the problem:**
We want to analyze and graph the function $$f(x) = 2x + \ln(x^2 - 3)$$ with the given domain and properties.
2. **Domain:**
The function is defined where the argument of the logarithm is positive:
$$x^2 - 3 > 0 \implies x < -\sqrt{3} \text{ or } x > \sqrt{3}$$
So the domain is $$(-\infty, -\sqrt{3}) \cup (\sqrt{3}, \infty)$$.
3. **Monotonicity (Increasing/Decreasing):**
The derivative is:
$$f'(x) = 2 + \frac{2x}{x^2 - 3} = \frac{2(x^2 - 3) + 2x}{x^2 - 3} = \frac{2x^2 - 6 + 2x}{x^2 - 3} = \frac{2x^2 + 2x - 6}{x^2 - 3}$$
Critical points come from numerator zero:
$$2x^2 + 2x - 6 = 0 \implies x^2 + x - 3 = 0$$
Using quadratic formula:
$$x = \frac{-1 \pm \sqrt{1 + 12}}{2} = \frac{-1 \pm \sqrt{13}}{2}$$
Given intervals:
- Increasing on $$(-\infty, \frac{1 - \sqrt{13}}{2}) \cup (\sqrt{3}, \infty)$$
- Decreasing on $$\left(\frac{1 - \sqrt{13}}{2}, -\sqrt{3}\right)$$
4. **Local maximum:**
At $$x = \frac{1 - \sqrt{13}}{2}$$, the function has a local maximum:
$$f\left(\frac{1 - \sqrt{13}}{2}\right) = 2\cdot \frac{1 - \sqrt{13}}{2} + \ln\left(\left(\frac{1 - \sqrt{13}}{2}\right)^2 - 3\right) = -\sqrt{13} + \ln\left(\frac{1 + \sqrt{13}}{2}\right)$$
5. **Concavity:**
The function is concave down on the entire domain and has no points of inflection.
6. **Asymptotes:**
- Vertical asymptotes at $$x = \pm \sqrt{3}$$ due to the logarithm's domain boundary.
- No horizontal or oblique asymptotes.
7. **Summary:**
- Domain: $$(-\infty, -\sqrt{3}) \cup (\sqrt{3}, \infty)$$
- Increasing on $$(-\infty, \frac{1 - \sqrt{13}}{2}) \cup (\sqrt{3}, \infty)$$
- Decreasing on $$\left(\frac{1 - \sqrt{13}}{2}, -\sqrt{3}\right)$$
- Local max at $$x = \frac{1 - \sqrt{13}}{2}$$ with value $$-\sqrt{13} + \ln\left(\frac{1 + \sqrt{13}}{2}\right)$$
- Concave down everywhere
- Vertical asymptotes at $$x = \pm \sqrt{3}$$
- No horizontal or oblique asymptotes
This fully describes the graph of $$f(x)$$.