Equation of the sphere of radius 3 and tangent to coordinate-planes
Problem
Find the equation of a sphere of radius 3 and tangent to all three coordinate planes if the center is on the first octant.
A. x2+y2+z2−9=0 |
B. x2+y2+z2−6x−6y−6z+18=0 |
C. x2+y2+z2−4x−4y−4z+12=0 |
D. x2+y2+z2−8x−8y−8z+14=0 |