Math Problem Statement
Solution
The problem asks to set up (but not evaluate) an integral for the volume of the solid obtained by rotating the region bounded by the curves , , , and rotating about the line .
Step-by-step solution:
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Identify the method to use:
- Since we are rotating about a vertical line , we use the shell method.
The shell method formula is:
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Radius of the shell:
- The radius is the distance from the curve to the current -coordinate.
- This distance is .
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Height of the shell:
- The height is the value of the function , which is just .
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Bounds of integration:
- The region is bounded by and , so these will be the limits of integration.
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Setting up the integral:
This is the required integral to compute the volume of the solid obtained by rotating the region around the line .
Would you like further details or have any questions?
Related Questions:
- What is the shell method, and when is it used instead of the disk/washer method?
- How would the setup change if we were rotating about the -axis instead of ?
- How would we compute the volume if we used the disk/washer method (if applicable)?
- What would be the integral setup if the function were instead of ?
- How does the choice of the axis of rotation affect the integral setup?
Tip:
Always double-check the axis of rotation and whether the shell or disk method is more appropriate based on the problem's geometry.
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Math Problem Analysis
Mathematical Concepts
Calculus
Volume of Solids of Revolution
Shell Method
Formulas
V = 2π ∫[a,b] (radius)(height) dx
Theorems
Volume by Shell Method
Suitable Grade Level
Undergraduate Calculus (Calculus I or II)
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