7-8. Shape of the curve Sketch a curve with the following properties. 7. f' < 0 and f" < 0, for x < 3 f' < 0 and f" > 0, for x > 3 8. f' < 0 and f" < 0, for x < -1 f' < 0 and f" > 0, for –1 0 and f" > 0, for 2 0 and f" < 0, for 8 < x< 10 f' > 0 and f" > 0, for x > 10

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