Answer
$r^2 < x^2+y^2+z^2< R^2$
Work Step by Step
The formula for a sphere is:
$x^2+y^2+z^2=r^2$
Since we want all the points between but not including the spheres of radius $r$ and radius $R$ where $r
Calculus 8th Edition
by Stewart, James
Published by
Cengage
ISBN 10:
1285740629
ISBN 13:
978-1-28574-062-1
Chapter 12 - Vectors and the Geometry of Space - 12.1 Three-Dimensional Coordinate Systems - 12.1 Exercises - Page 837: 41
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