When n tends to infinity, does it imply that n is greater than 0?

This kind of question is like asking, "Is it possible that a positive number is actually a negative number?"

If the landlord is a classmate next to me asking me this question, I may laugh at his IQ or whether he has never been to high school or even high school at all. Of course, it may be too persistent or forgotten. In fact, there are-∞ and tend to 0.

When any number tends to ∞ (no negative sign), don't even think about it, it is positive! (To ask why, please look back at my first paragraph), when it tends to-∞, it is also negative!

Only discuss whether it is positive or negative when it tends to 0! Because it may tend to zero from the left, it is negative; It is positive if it tends to 0 from the right. That's why we should discuss the left limit and the right limit. Because this point 0 is a very special point in differential calculus, many topics will be discussed around this point 0.

Speaking of which, if the landlord still wants to ask why ∞ is positive, then I think you can write a paper to discuss the cancellation of-∞ and whether it is positive or negative every time ∞ appears.