of a sphere witha center (1,4,-3) and tangent to the xz plane

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- May 5th 2009, 01:27 PMtiga killawrite the equation
of a sphere witha center (1,4,-3) and tangent to the xz plane

- May 5th 2009, 02:34 PMskeeter
- May 5th 2009, 02:38 PMSoroban
Hello, tiga killa!

Quote:

Write the equaton of a sphere with center (1,4,-3) and tangent to the xz-plane

Can you visualize the sphere?

. . If it is tangent to the xz-plane, the radius is 4.

Therefore: .

- May 5th 2009, 02:43 PMInfophile
Hello,

You have just to find the radius of this sphere.

It corresponds of the abscissa since it has to be tangent to .

Hence and thus the equation of the sphere is

**Edit**: What I called is the plan , maybe the sphere is tangent to ?

:)