方程有实根所以m²-4(1-2m)≥0即m²+8m-4≥0(m+4)²≥20m≤-4-2√5或m≥-4+2√5区间（0,2）内仅有一个实数根只需要满足f(0)f(2)＜0即(1-2m)(4-2m+1-2m)＜0即（1-2m)(5-4m)＜0解得1/2＜m＜5/4综上可得实...