Math Problem Statement
Solution
To solve this problem, we need to compute the volume of the solid generated by rotating the region bounded by the given equations and about the -axis.
Steps:
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Understand the Shape of the Region:
- represents a "V"-shaped graph with its vertex at , symmetric about , decreasing linearly on both sides.
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Boundaries of Integration:
- Since is the x-axis, the region is bounded between and .
- Solve for in terms of : Split into two linear equations depending on :
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Volume via Shell Method:
- The formula for the volume of a solid of revolution about the -axis using the shell method is:
- The radius is , and the height is .
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Set up the Integral:
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Solve the Integral: Apply the limits to :
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Compute the Volume:
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Numerical Approximation: Using :
Final Answer:
The volume of the solid is approximately 33.51 cubic units.
Let me know if you'd like further clarification or additional details. Here are some related questions:
- How is the shell method different from the disk/washer method?
- What happens if the solid is revolved about the -axis instead?
- Can this problem be solved using polar coordinates?
- How does the absolute value in the function affect the region's boundaries?
- What if the function was instead? Would the volume change?
Tip: Always sketch the region and axis of revolution to visualize the problem better before setting up the integral.
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Math Problem Analysis
Mathematical Concepts
Calculus
Solid of Revolution
Integral Calculus
Formulas
Volume using Shell Method: V = 2π ∫ (radius) * (height) dy
Integral of y^2: ∫ y^2 dy = y^3 / 3
Theorems
Fundamental Theorem of Calculus
Suitable Grade Level
College Level
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