First post! yay!
Okay so yesterday I had a problem set due and it had two definition of limit at infinity proofs on it. I ended up leaving them... well not blank but all I did was write the definition.
the question was:
prove the following statements using the appropriate definition of limit:
(i) Limit as x-> infinity sqrt(x) - x = -infinity
I got as far as:
Given N<0, there exists M>0 such that
x>M implies sqrt(x) - x < N
which I believe is the appropriate definition.
I always draw a blank on these proofs. The first thing I did when I made my account here was print the sticky on definition of limit proofs. I am going through it now.
Anyways any help on this would be amazing, Thanks!