EQUATION OF SPHERE

The equation of a Sphere having centre (1,2,3) and radius 3 units is . . . .

Find equation of the sphere if the line segment joining the Points (4, 5,6) and (2, 3, 4) is a diameter of the sphere.

Equation of the sphere described on the join of the points bara=2bari+barj-bark and barb=bari-barj+bark as diameter, is

The equation of a sphere is x^2+y^2+z^2-10z=0 . If one end point of a diameter of the sphere is (-3,4,-5) , what is the other en point?

Equation of the sphere concentric with the sphere x^(2)+y^(2)+z^(2)+2x - 4y + 6z + 12 = 0 and passing through origin is :

Equation of the sphere with centre (1,-1,1) and radius equal to the of sphere 2x^(2)+2y^(2)+2z^(2)-2x+4y-6z=1 is

The plane x/a+y/b+z/c=1 meets the coordinate axes at A,B and C respectively. Find the equation of the sphere OABC.

Find the equation of the sphere passing through the points (0,0,0);(-a,b,c);(a,-b,c);(a,b,-c) Also find its radius.