f(x)=√(1-x^2)/(X-3) -m有零点√(1-x^2)/(X-3) =m有实数解√(1-x^2)=m(x-3)有实数解y=√(1-x^2)与y=m(x-3)图象有交点函数y=√(1-x^2)(-1≤x≤1,0≤y≤1)x^2+y^2=1 (-1≤x≤1,0≤y≤1)图象为圆x^2+y^2=1的上半部分（...