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Find the trace on the xy-plane of the sphere having center at (−1, 3, −1) and radius 2.
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Find the trace on the xy-plane of the sphere having center at (−1, 3, −1) and radius 2.

User ToDo
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Hi,

The sphere has for equation :(x+1)²+(y-3)²+(z+1)²=4
The xy plane has for equation z=0
The trace off the sphere in the xyplane is
(x+1)²+(y-3)²=4 (the circle of center (-1,3,0) &nd 2 as radius)


User Booiljoung
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