### Find the absence of limits for z/z-negated

Show that the limit of the function: f(z) = ( z / z-negated)^2 (z-negated -> by this i mean z with a bar above it) as z tends to 0 does not exist. Do this be letting nonzero points z = (x,0) and z = (x,x) approach the origin. note: it's not sufficient to simply consider points z = (x,0) and z = (0,y)