2. Define F: R2 + R2 by f(x,y) = (-x,y). Prove that for any open set U containing the origin, it is impossible to find a positive constant k for which for all , be U. ||- |||* || 4 2. Define F: R2 + R2 by f(x,y) = (-x,y). Prove that for any open set U containing the origin, it is impossible to find a positive constant k for which for all , be U. ||- |||* || 4