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Question


Find the locus of the point which is at a distance of 3 units from the origin.


Options:
A .   x+y+z=3
B .   x+y+z=9
C .   x2+y2+z2=9
D .   x2+y2+z2=3
Answer: Option C
:
C

Let P(x,y,z) be the required point.
According to the given condition
(x0)2+(y0)2+(z0)2=3x2+y2+z2=9



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