- #1

fabbi007

- 20

- 0

Hint: use the mapping from N eve→Nn

N even to N is given by n-->n

a. Show examples of this mapping from N even

N even to N.

b. Is the mapping above onto? One-to-one?

**My try at this question:**

Since the mapping is n-->n it is the range of this mapping function is a proper subset of N hence the card (N even) <card (N) because there is one to one mapping and the N even maps into N.

Examples above mapping. 2->2, 4->4, 8->8, 268->268... Hence card(N even)< Card (N)