求过两点A（1,4）,B（3,2）且圆心在直线y=0上的圆的标准方程
人气：265 ℃ 时间：2020-01-26 11:27:34
解答
设圆心（x 0)圆心到AB的距离是相等的且等于半径所以 (x-1 )²+4²=(x-3)²+2²x²-2x+1+16=x²-6x+9+4-2x+17=-6x+13-2x+17+6x-13=04x=-4x=-1所以圆心（-1 0）半径r²=20所以圆的方程（x...
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