由不等式可知m²＞0,所以1/m²-4m²-1≤-8/3可化为1-4m^4+5m²/3≤0,12m^4-5m²-3≥0,（3m²+1）（4m²-3）≥0,又∵3m²+1＞0,∴不等式同解于4m²-3≥0即m²≥3/4m≤-√3/2...