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Mathematics
Problem
Let
A
=
{
x
∈
Z
∣
2
≤
x
≤
4
}
A=\{x \in \mathbb{Z}\mid 2 \le x \le 4\}
A
=
{
x
∈
Z
∣
2
≤
x
≤
4
}
and
B
=
{
y
∈
Z
∣
y
=
0
or
y
=
3
}
B=\{y \in \mathbb{Z}\mid y=0 \text{ or } y=3\}
B
=
{
y
∈
Z
∣
y
=
0
or
y
=
3
}
. a. (i) Write the elements of the sets
A
A
A
and
B
B
B
. b. (ii) How many ordered pairs are there in
A
×
B
A \times B
A
×
B
?
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