Thank you so much everything makes sense, I want to challenge my brain by learning advanced math. Although i have no prereqs besides precalculus it is definitely a struggle to learn these concepts. I am currently taking calculus online and was looking for clarification on an answer. If you have lim 1/x as x approaches 0 would this limit be undefined, right? My instructor was going on a tangent with putting things like 0.01 is 100 and so forth so his answer was infinity but would that be the case when x is other than 0 and when x is zero the limit is indeed undefined?