(Section 1.2: Graphs of Functions) 1.2.13 PART H: INTERVALS OF INCREASE, DECREASE, AND CONSTANT VALUEWe may have an intuitive sense of what it means for a function to increase(respectively, decrease, or stay constant) on an interval. In Examples 11 and 12, we will formalize this intuition. Example 11 (Intervals of Increase and Intervals of Decrease from a Graph)Let fx()=x3±3x+2. The graph offis below. Give the intervals of increase and the intervals of decrease forf. • It is assumed that we give the “largest” intervals in the sense that no interval we give is a proper subset of another appropriate interval.
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