Today in class, my math teacher and me had a very long drawn debate about this question and were confused about how to solve the question. I have attached an image of the question.
My doubt is whether the question is sensible asking us to find n after giving us a limit with n tending to 0. Also natural numbers don't tend to 0. Please help me out. I would appreciate it if anyone could post a solution or suggest some possible alteration to the question to obtain the correct answer.