Use a graphing calculator for Exercises 69.
Graph y = x4 - 2x3 + 2x in a window with -3 ≤ x ≤ 3 . Is the “fl at” part of the graph near x = 1 really a horizontal line segment? (Hint : Use the trace feature to move along the “fl at” part and watch the y -coordinates. Do they remain the same [as they should on a horizontal segment]?)
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