与园(x+1)²+y²=1外切,且与圆(x-1)²+y²=9内切的动圆圆心的轨迹方程
与园(x+1)²+y²=1外切,且与圆(x-1)²+y²=9内切的动圆圆心的轨迹方程
数学人气:184 ℃时间:2020-03-27 17:33:57
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(x+1)²+y²=1的圆心坐标(-1,0),半径1(x-1)²+y²=9的圆心坐标(1,0),半径3令与园(x+1)²+y²=1外切,且与圆(x-1)²+y²=9内切的圆的圆心坐标为(x,y),半径r∵与园(x+1)²+y&...
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