圆c1;x^2+y^2+2mx+4y+m^2-5=0,圆c2;x^2+y^2-2x-2my+m^2-3=0(m>0),(1若外切,求出m的值及俩圆外公切线

题目

圆c1;x^2+y^2+2mx+4y+m^2-5=0,圆c2;x^2+y^2-2x-2my+m^2-3=0(m>0),(1若外切,求出m的值及俩圆外公切线

答案

圆C1：x²+y²+2mx+4y+m²-5=0,圆C2：x²+y²-2x-2my+m²-3=0,（m＞0）相切,即圆心距离为两圆半径之和：圆C1：x²+y²+2mx+4y+m²-5=0x²+2mx+m²+y²+4y+4=9(x+m)...