△ = (2m-1)² -4m²≥ 0-4m + 1 ≥ 0m ≤ 1/4设两根为x1 ,x2那么：x1 -1 > 0 ,x2-1 > 0所以 x1 - 1 + x2 - 1 > 0 且 (x1 - 1)(x2-1) > 0根据韦达定理,x1 + x2 = 1 -2m ;x1x2 = m²所以 1 -2m -2 > 0 且...