# multivariable calc question

• Aug 28th 2009, 12:58 PM
ricey
multivariable calc question
Describe the given set with a single equation or with a pair of equations:

The set of points in space that lie 2 units from the point (0,0,1) and, at the same time, 2 units from the point (0,0,-1).

I got the circle x^2 +y^2=3, z=0
is this correct?
• Aug 28th 2009, 01:02 PM
eXist
I agree 100% :D!

It would be a circle in $R^2$ with radius $\sqrt{3}$

which is what u have.