Posted by Kate on Sunday, October 17, 2010 at 11:00pm.
If a point on the surface of a sphere with its center at the origin has coordinates (9,4,6) how do you show the radius connecting the origin to this point as a position vector. Is it simply [9,4,6] or is it more complicated than that. Thanks.

Math/Vectors  MathMate, Monday, October 18, 2010 at 11:05am
If the sphere's centre is at the origin, then the vector from the origin to the point is simply (9,4,6) as you stated.

Math/Vectors  MathMate, Monday, October 18, 2010 at 11:07am
If the vector is from a point (x0,y0,z0) to the given point, then it is
(9x0, 4y0, 6z0).
So when (x0,y0,z0)=(0,0,0), it reduces to simply (9,4,6).

Math/Vectors  Kate, Monday, October 18, 2010 at 12:31pm
Thanks!
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