Question: Let f(x) = x 4 + x. Show that even though f(0) = 0, the graph of f has neither a relative extremum nor an

Let f(x) = x⁴ + x. Show that even though f"(0) = 0, the graph of f has neither a relative extremum nor an inflection point where x = 0. Sketch the graph of f(x).

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