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A cubic polynomial goes to +infinity on one side and -infinity on the other. So taking exp, log, etc won't make it go to 0 on both sides. I can think of two pos
by cousin_it 6y ago
A cubic polynomial goes to +infinity on one side and -infinity on the other. So taking exp, log, etc won't make it go to 0 on both sides. I can think of two possible explanations: 1) the leading coefficient happens to be 0, so it's actually quadratic fit 2) the leading coefficient is nonzero, so somewhere to the left or right the graph starts rising again, but it's not visible due to cropping. Anyway by now we've spent more time thinking about this than any of the participants, so we should call it a day.