I know to how prove normal limits using the epsilon-delta definition, say:
limx→a f(x)=L But, there was a question on my textbook which I couldn't quite figure out to do, even though I've thought about it for a while I don't even know how to go about starting it.
Use ε-δ definition of a limit to prove that
limx→c f(x)=0 iff limx→c |f(x)|=0
Could anyone help me with this, even a hint on where to start? Thank you in advanc