Arrow Diagrams

2009-03-02 7:58 pm
Consider functions f and g which are represented by sets of ordered
pair:

f={(1,a), (2,b), (3,c), (4,d), (5,e) }
g={(b,1.2), (c,2.5), (d,1.2), (e,0), (f,2.5)}

1. Represent g。f as a set of ordered pairs.

2. represent g。f as an arrow diagram

3. Explain how you can use the arrow diagrams for f and g to find the arrow diagram for g。f ?

回答 (2)

2009-03-03 9:09 am
✔ 最佳答案
1 g。f={(2,1.2),(3,2.5),(4,1.2),(5,0)}
2 From 2, draw an arrow to 1.2 and similar for others.
3 For example, from the arrow diagram of f, we can see that 2->b. On the other hand, arrow diagram of g shows that b->1.2. So g。f(2)=1.2
2009-03-02 8:16 pm
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