1+x/(2-x)=2m/(x^2-4)1+x/(2-x)+2m/(4-x^2)=0(4-x^2+2x+x^2+2m)/(4-x^2)=0(4+2x+2m)/(4-x^2)=0x=-m-2≠±2m≠-2±20.2x<0.3x+1-x<10x>-102(x-3)≥x-8 x≥-2所以x≥-2x=-m-2≥-2m≤0又m≠-2±2所以-4≠m且m小于等于0