求下列球面的球心和半径:(1)x2+y2+z2-6x+10y-2z-1=0;(2)x2+-y2+z2-2x+16y+2z+2=0

求下列球面的球心和半径:
(1)x2+y2+z2-6x+10y-2z-1=0;
(2)x2+-y2+z2-2x+16y+2z+2=0.
【正确答案】:(1)球心(3,-5,1),半径R=6; (2)球心(1,-8,-1),半径R=8.