Sketch & Find Volume of Rotated Shell: y=x^2+1, y=-1

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SUMMARY

The discussion focuses on calculating the volume of a solid of revolution formed by rotating the area between the curves y=x^2+1 and y=-1 around the line y=-1. Participants emphasize the importance of sketching the region and using the shell method for volume calculation. The integral setup is crucial, and contributors suggest posting initial attempts to facilitate guidance. The key takeaway is the necessity of visualizing the shape and understanding the application of the shell method in this context.

PREREQUISITES
  • Understanding of the shell method for volume of revolution
  • Familiarity with the curves y=x^2+1 and y=-1
  • Basic knowledge of integral calculus
  • Ability to sketch regions bounded by curves
NEXT STEPS
  • Research the shell method for calculating volumes of revolution
  • Learn how to set up integrals for volumes of solids of revolution
  • Explore graphical techniques for sketching curves and regions
  • Study examples of volume calculations involving y=constant lines
USEFUL FOR

Students studying calculus, particularly those focusing on volume calculations, educators teaching integral calculus, and anyone seeking to understand the shell method for solids of revolution.

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Homework Statement


I have to sketch a vertical or horizontal strip and state an expression for the volume of the shell formed by its rotation. Do not solve

y=x^2+1 x=0
y=1 x=1

around y=-1

Homework Equations





The Attempt at a Solution


I'm really lost because I don't know how to get started. I think dy works but I can't get it right. Any help will be great thanks.
 
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Have you figured out the shape in the plane? As a volume of revolution?
Pls post what you have for the integral so that we can see where you are stuck.
 

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