Absolute Extrema 320253
1. **State the problem:** Find the absolute minimum and absolute maximum of the function $$f(x) = x^2 + 4x + 5$$ on the interval $$[-3, 1]$$.
2. **Formula and rules:** To find absolute extrema on a closed interval, evaluate the function at critical points inside the interval and at the endpoints.
3. **Find critical points:** Compute the derivative:
$$f'(x) = 2x + 4$$
Set derivative to zero to find critical points:
$$2x + 4 = 0 \implies x = -2$$
4. **Check if critical point is in the interval:** $$-3 \leq -2 \leq 1$$, so yes.
5. **Evaluate function at critical point and endpoints:**
- At $$x = -3$$:
$$f(-3) = (-3)^2 + 4(-3) + 5 = 9 - 12 + 5 = 2$$
- At $$x = -2$$:
$$f(-2) = (-2)^2 + 4(-2) + 5 = 4 - 8 + 5 = 1$$
- At $$x = 1$$:
$$f(1) = 1^2 + 4(1) + 5 = 1 + 4 + 5 = 10$$
6. **Determine absolute extrema:**
- Absolute minimum is $$1$$ at $$x = -2$$.
- Absolute maximum is $$10$$ at $$x = 1$$.
**Final answer:**
- Absolute minimum: $$f(-2) = 1$$
- Absolute maximum: $$f(1) = 10$$