Domain changed to archive.palanq.win . Feb 14-25 still awaits import.
[5 / 3 / ?]

Plz help :(

ID:nW3DSrhX No.7031556 View ViewReplyOriginalReport
Is there anyone here who has studied multi-variable calculus? Can someone help me understand this (example 3):
limit (x,y) tending to (0,0) (4xy^2)/(x^2 + y^2) = 0 because (4xy^2)/(x^2 + y^2) <= 4sqrt(x^2 + y^2) <4δ = ϵ
How and why did they assume that δ = 4ϵ and what does this prove anyway?