Answered: Consider the following functions…

Consider the following functions f:{1,2,3,4}→{1,2,3,4,5}. For each, determine whether it is (only) injective, (only) surjective, bijective, or neither.

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question

Consider the following functions f:{1,2,3,4}→{1,2,3,4,5}. For each, determine whether it is (only) injective, (only) surjective, bijective, or neither.

?
?
?
2 4
- (1 3 3 3 )
5 5 5 5
1. f =
2. f(x) =
x/2
(x+1)/2
1 2
3 4
5 1 3 1
| 3. f = ( 1 )
if x is even
if x is odd

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