1. **State the problem:** We need to find the limit
$$\lim_{h \to 0} \frac{\frac{5}{(2+h)^2} - \frac{5}{2^2}}{h}$$
2. **Recognize the form:** This is the definition of the derivative of the function
$$f(x) = \frac{5}{x^2}$$
at the point $x=2$.
3. **Recall the derivative formula:**
$$f'(x) = \lim_{h \to 0} \frac{f(x+h) - f(x)}{h}$$
4. **Apply the function:**
$$f(2+h) = \frac{5}{(2+h)^2}, \quad f(2) = \frac{5}{2^2} = \frac{5}{4}$$
5. **Rewrite the limit:**
$$\lim_{h \to 0} \frac{\frac{5}{(2+h)^2} - \frac{5}{4}}{h}$$
6. **Find a common denominator inside the numerator:**
$$\frac{5}{(2+h)^2} - \frac{5}{4} = \frac{5 \cdot 4 - 5 \cdot (2+h)^2}{4 (2+h)^2} = \frac{20 - 5(2+h)^2}{4 (2+h)^2}$$
7. **Substitute back into the limit:**
$$\lim_{h \to 0} \frac{\frac{20 - 5(2+h)^2}{4 (2+h)^2}}{h} = \lim_{h \to 0} \frac{20 - 5(2+h)^2}{4 (2+h)^2 \cdot h}$$
8. **Expand $(2+h)^2$:**
$$(2+h)^2 = 4 + 4h + h^2$$
9. **Substitute expansion:**
$$20 - 5(4 + 4h + h^2) = 20 - 20 - 20h - 5h^2 = -20h - 5h^2$$
10. **Rewrite the limit:**
$$\lim_{h \to 0} \frac{-20h - 5h^2}{4 (4 + 4h + h^2) h}$$
11. **Factor $h$ from numerator:**
$$\lim_{h \to 0} \frac{h(-20 - 5h)}{4 (4 + 4h + h^2) h}$$
12. **Cancel $h$ using \cancel:**
$$\lim_{h \to 0} \frac{\cancel{h}(-20 - 5h)}{4 (4 + 4h + h^2) \cancel{h}}$$
13. **Simplify:**
$$\lim_{h \to 0} \frac{-20 - 5h}{4 (4 + 4h + h^2)}$$
14. **Evaluate the limit by substituting $h=0$:**
$$\frac{-20 - 0}{4 (4 + 0 + 0)} = \frac{-20}{16} = -\frac{5}{4}$$
**Final answer:**
$$\boxed{-\frac{5}{4}}$$
Limit Derivative 731F7C
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