Table of contents
- 0. Functions7h 52m
- Introduction to Functions16m
- Piecewise Functions10m
- Properties of Functions9m
- Common Functions1h 8m
- Transformations5m
- Combining Functions27m
- Exponent rules32m
- Exponential Functions28m
- Logarithmic Functions24m
- Properties of Logarithms34m
- Exponential & Logarithmic Equations35m
- Introduction to Trigonometric Functions38m
- Graphs of Trigonometric Functions44m
- Trigonometric Identities47m
- Inverse Trigonometric Functions48m
- 1. Limits and Continuity2h 2m
- 2. Intro to Derivatives1h 33m
- 3. Techniques of Differentiation3h 18m
- 4. Applications of Derivatives2h 38m
- 5. Graphical Applications of Derivatives6h 2m
- 6. Derivatives of Inverse, Exponential, & Logarithmic Functions2h 37m
- 7. Antiderivatives & Indefinite Integrals1h 26m
3. Techniques of Differentiation
Product and Quotient Rules
Problem 3.4.34
Textbook Question
Derivatives Find and simplify the derivative of the following functions.
s(t) = t⁴/³ / e^t
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1
Step 1: Identify the function s(t) = \frac{t^{4/3}}{e^t}. This is a quotient of two functions, so we will use the Quotient Rule to find the derivative.
Step 2: Recall the Quotient Rule: If you have a function \frac{u(t)}{v(t)}, its derivative is \frac{u'(t)v(t) - u(t)v'(t)}{(v(t))^2}. Here, u(t) = t^{4/3} and v(t) = e^t.
Step 3: Differentiate u(t) = t^{4/3}. Use the power rule: \frac{d}{dt}[t^n] = nt^{n-1}. So, u'(t) = \frac{4}{3}t^{1/3}.
Step 4: Differentiate v(t) = e^t. The derivative of e^t with respect to t is simply e^t, so v'(t) = e^t.
Step 5: Substitute u(t), u'(t), v(t), and v'(t) into the Quotient Rule formula: \frac{\frac{4}{3}t^{1/3}e^t - t^{4/3}e^t}{(e^t)^2}. Simplify the expression by factoring and combining like terms.
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