Use the two-path test to prove that the following limit does X + 2y not exist. What value does f(x,y) = x - 2y approach as (x,y) approaches (0,0) along the x-axis? Select the x + 2y lim correct choice below and, if necessary, fill in the (x,y)-(0,0) x - 2y answer box to complete your choice. O A. f(x,y) approaches x + 2y (Simplify your answer.) Z = x - 2y O B. f(x,y) has no limit and does not approach co or - co as (x,y) approaches (0,0) along the x-axis. X V