1. **Stating the problem:** We are given the function $$f(x) = (2 - x^2)(\ln x + 1)$$ and asked to analyze it according to the following points:
2. **Domain (תחום הגדרה):**
- The term $$\ln x$$ is defined only for $$x > 0$$.
- Therefore, the domain of $$f(x)$$ is $$x > 0$$.
3. **Vertical asymptote (אסימפטוטה אנכית):**
- Since $$\ln x$$ tends to $$-\infty$$ as $$x \to 0^+$$, and $$2 - x^2$$ tends to 2 near 0, the function $$f(x)$$ tends to $$2 \cdot (-\infty) = -\infty$$.
- Thus, there is a vertical asymptote at $$x = 0$$.
4. **Behavior near the asymptote (זינוק עם הפונקציה):**
- As $$x \to 0^+$$, $$f(x) \to -\infty$$.
- As $$x \to +\infty$$, $$2 - x^2 \to -\infty$$ and $$\ln x + 1 \to +\infty$$.
- The product of a large negative and large positive tends to $$-\infty$$.
5. **Critical points and extrema (נקודות קיצון ונעילה):**
- To find critical points, compute $$f'(x)$$:
$$f(x) = (2 - x^2)(\ln x + 1)$$
Using product rule:
$$f'(x) = (2 - x^2) \cdot \frac{1}{x} + (\ln x + 1) \cdot (-2x)$$
Simplify:
$$f'(x) = \frac{2 - x^2}{x} - 2x(\ln x + 1) = \frac{2}{x} - x - 2x \ln x - 2x$$
Combine terms:
$$f'(x) = \frac{2}{x} - 3x - 2x \ln x$$
Set $$f'(x) = 0$$:
$$\frac{2}{x} - 3x - 2x \ln x = 0$$
Multiply both sides by $$x$$:
$$2 - 3x^2 - 2x^2 \ln x = 0$$
Rearranged:
$$2 = 3x^2 + 2x^2 \ln x = x^2 (3 + 2 \ln x)$$
So:
$$x^2 (3 + 2 \ln x) = 2$$
This transcendental equation can be solved numerically to find critical points.
6. **Sketch of $$f(x)$$ (עיר סקיצה של f(x))**:
- Domain: $$x > 0$$.
- Vertical asymptote at $$x=0$$ with $$f(x) \to -\infty$$.
- For large $$x$$, $$f(x) \to -\infty$$.
- Critical points found by solving $$x^2 (3 + 2 \ln x) = 2$$.
7. **Check the equation of $$g(x)$$ (בדיקה את המשוואה הנכונה של g(x))**:
Given:
$$g(x) = -2 - f(x)$$
This means $$g(x)$$ is the function $$f(x)$$ reflected and shifted down by 2.
**Final answer:**
- Domain: $$x > 0$$.
- Vertical asymptote at $$x=0$$.
- Critical points satisfy $$x^2 (3 + 2 \ln x) = 2$$.
- $$g(x) = -2 - f(x)$$.
Function Analysis Cf8F29
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