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Derivatives and Curve Sketching - Part_10
In general a curve y = f(x) may go up and down several times. To sketch it we need to determine the intervals on which it is increasing or decreasing, and concave upward or downward. Here are some things which may happen at the endpoints of these intervals. DEFINITION Let c be an interior point of I.
These definitions are illustrated in Figure 3.7.9. Figure 3.7.9
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