Hey guys, so i have the following: and I'm trying to figure out a function that works for that limit, but doesn't have a second derivative at ... been scratching my head over this one for a while lol thanks!
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edit2: wait, no, I was right lol. Let a=0 and try .
if if The limit clearly exists and is zero, for the numerator is identically zero. But is discontinuous at and hence has no derivatives there.
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