Pic unrelated: The topic sounds like hover-hand insecurity?
No, we're not talking why statistically, people who aspires to be mathematicians tend to be a virgin up until they graduate tertiary education.
We are talking about limit in mathematics.
Limit, the most arcane annoying part of elementary calculus, without which, differentiation have nothing to work upon. You'll hear your lecturer say "it's like you're there, but you're not actually there!". -_-" Can mathematics be anymore strange than that? You haven't seen it all just yet.
So, I'm not gonna repeat what your lecturer said in class. This blog is supposed to just supplement your classes informally.
Anyway, in my lecture, I felt like i was skipping here and there and writing mumbo-jumbo in the white board when demonstrating how to solve limit problems (and I believe there are some if not many lecturers out there that teach like me, especially those who are inexperienced, which, again, like me).
Here is an attachment that outlines how to properly present your solution to problems that asks "Find limit of f(x) as x approaches a". The writings in red denotes my comment which if you include in your exam answer script will make you look like a douche trying to be a smart ass. Those are just my comments to rationalize why mathematicians insist on students writing a certain way to answer this *cough*idontgiveadamn*cough* problem. Don't blame me.
Comment to self: Surely, I have just made my blog more lame.