12SUMMARY OF FUNCTIONS
In this chapter, we summarize and extend the properties of functions we discussed in previous chapters.
12.1 Cubic, Square Root, and Cube Root Functions
We talked about polynomial functions with degree 1 (in Chapter 7) and degree 2 (in Chapter 9). We can extend these ideas by looking at cubic functions, which are polynomial functions with degree 3.
Figure 12.1 shows the graph and equation of the cubic equation y = x3 − 2x2 − 5x + 6.
Figure 12.1 Vocabulary for cubic functions.
Note the following characteristics of the graphs of cubic equations:
- They do not consist of two parabolas.
- They have no absolute maximum ...
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