section 2.3: functions

Question 1

what is a function?

Answer 1

let A and B be nonempty sets. A function F from A to B is an assignment of exactly one element in B to each element of A. we write f(a) = b is the unique element of B assigned by the function F to the element a of A.

Question 2

if F is a function from A to B we write:

Answer 2

f: A –> B

Question 3

A is the _________ of F

Answer 3

domain

Question 4

B is the __________ of F

Answer 4

codomain