10.已知线段ABABAB,则平面上全体满足∣AP∣2+∣BP∣2\vert AP\vert ^{2}+\vert BP\vert ^{2}∣AP∣2+∣BP∣2为定值C>∣AB∣22C>\frac{\vert AB\vert ^2}{2}C>2∣AB∣2的点PPP的轨迹是((( )))