Concept explainers
Use the region R that is bounded by the graphs of
8. Region R is revolved about the y-axis to form a solid of revolution whose cross sections are washers
a. What is the outer radius of a cross section of the solid at a point y in [1, 3]?
b. What is the inner radius of a cross section of the solid at a point y in [1, 3]?
c. What is the area A(y) of a cross section of the solid at a point y in [1, 3]?
d. Write an
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Calculus: Early Transcendentals (3rd Edition)
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