15.* 1 point the equation of the sphere, which passes through (a,0,0),(0,b,0) (0,0,c) and (0,0,0) is ? (a) x2+y2+z2 = a2 (b) x+y2+z2 = a2 +b2 + c2 (c)x2 +y2 +z2

15.* 1 point The equation of the sphere, which passes through (a,0,0),(0,b,0) (0,0,c) and (0,0,0) is ? (a) x2+y2+z2 = a2 (b) x+y2+z2 = a2 +b2 + c2 (c)x2 +y2 +z2 t ax + by + cz = 0 (d) x2+y2 +z2- ax - by - cz = 0