Let (x), y2 (x), ys (x) be linearly independent solution of the differential equation y-y" = 0. if the wronskian w(y.y2,y,) is of the form ae for some constant

Let (x), y2 (x), ys (x) be linearly independent solution of the differential equation y-y" = 0. If the Wronskian W(y.y2,y,) is of the form ae for some constant a, then the value of a is