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
- 8. Definite Integrals3h 25m
5. Graphical Applications of Derivatives
Applied Optimization
Problem 48
Textbook Question
Find the height h, radius r, and volume of a right circular cylinder with maximum volume that is inscribed in a sphere of radius R.
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1
Start by visualizing the problem: draw a sphere of radius R and inscribe a right circular cylinder within it. Identify the relationships between the cylinder's dimensions (height h and radius r) and the sphere's radius R.
Use the Pythagorean theorem to relate the radius of the sphere, the radius of the cylinder, and half the height of the cylinder. The relationship can be expressed as: R^2 = r^2 + (h/2)^2.
Set up the volume V of the cylinder as a function of its dimensions: V = πr^2h. To maximize the volume, express h in terms of r using the relationship from step 2.
Substitute the expression for h into the volume formula to get V as a function of r only: V(r) = πr^2(2√(R^2 - r^2)).
Differentiate the volume function V(r) with respect to r, set the derivative equal to zero to find critical points, and analyze these points to determine the maximum volume.
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