hello, i get why the 4th option is correct. However, i doubt how the solution is written is correct.
x=y=0, does it necessarily mean function(x)=function(y)? Can we directly say no relation from here because we don’t know what’s the function?.. like function could be anything right?
If x = 0 and y = 0, you are comparing f(0) and f(0). It’s the same thing.