Chapter 12 - Vectors and the Geometry of Space - 12.1 Three-Dimensional Coordinate Systems - 12.1 Exercises - Page 837: 33

All point on a Sphere with radius 2 and center (0,0,0)

Describe in words : $x^{2} + $y^{2} +$z^(2) = $4 Equation of a Sphere with center being the origin is: $x^{2} + $y^{2} +$z^(2) = $1 hence the answer is: All point on a Sphere with radius 2 and center (0,0,0)