- $ F(x) = x + \\\ln \\\left| {2x - 1} \\\right| - 1.$
- $ F(x) = x + \\\frac{1}{2}\\\ln \\\left| {2x - 1} \\\right| - 1.$
- $ F(x) = x + \\\frac{1}{2}\\\ln \\\left| {2x - 1} \\\right| + 1.$
- $ F(x) = \\\frac{1}{2}\\\ln \\\left| {2x - 1} \\\right| - 1.$