Hi, I have a question about : http://imgur.com/RU7PvtJ I actually understand what I need to do. I need to see if both one sided limits are the same to establish that the limit exists. The only thing which I just find weird is the "since y --> 2^(-) implies y<-2" Can somebody explain me where this y --> 2^(-) is coming from ??
It is just a notation to denote the left-hand limits. So [tex]\lim_{x\rightarrow a^-} f(x)[/tex] is the limit of ##f(x)## as ##x\rightarrow a## but ##x<a##.
Yes, you are correct. The book is wrong there (and it is wrong is the same place on the next line too).