1. State the problem: Differentiate the function $f(x) = \frac{x^5}{x^2}$ using the quotient rule.
2. Formula: The quotient rule states that if $f(x) = \frac{g(x)}{h(x)}$, then
$$f'(x) = \frac{g'(x)h(x) - g(x)h'(x)}{(h(x))^2}$$
3. Important rule: When differentiating powers of $x$, use the power rule: $\frac{d}{dx} x^n = nx^{n-1}$.
4. Intermediate work:
- Let $g(x) = x^5$, so $g'(x) = 5x^4$.
- Let $h(x) = x^2$, so $h'(x) = 2x$.
- Apply quotient rule:
$$f'(x) = \frac{5x^4 \cdot x^2 - x^5 \cdot 2x}{(x^2)^2} = \frac{5x^{6} - 2x^{6}}{x^{4}} = \frac{3x^{6}}{x^{4}}$$
5. Simplify:
$$f'(x) = 3x^{6-4} = 3x^{2}$$
6. Final answer: The derivative of $f(x) = \frac{x^5}{x^2}$ is
$$f'(x) = 3x^{2}$$
This process can be applied to other quotient problems involving exponents.
Here are 10 practice questions:
1. Differentiate $\frac{x^7}{x^3}$.
2. Differentiate $\frac{x^4}{x^5}$.
3. Differentiate $\frac{x^{10}}{x^2}$.
4. Differentiate $\frac{x^6}{x^6}$.
5. Differentiate $\frac{x^8}{x^4}$.
6. Differentiate $\frac{x^9}{x^3}$.
7. Differentiate $\frac{x^{12}}{x^7}$.
8. Differentiate $\frac{x^5}{x^1}$.
9. Differentiate $\frac{x^{11}}{x^5}$.
10. Differentiate $\frac{x^{15}}{x^{10}}$.
Try applying the quotient rule and power rule to each to find their derivatives.
Quotient Rule Exponents F52Cf1
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