设重心G(x,y),C(x',y')0+2+x'=3x2+1+y'=3y得x'=3x-2y'=3y-3因为C在直线x-2y+3=0上移动∴(3x-2)-2(3y-3)+3=0整理得3x-6y+7=0 解析几何重心公式设三点(x1,y1)(x2,y2)(x3,y3)则重心坐标为[(x1+x2+x3)/3,(y1+y2+y3)/3]这...