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Mathematics
Mathematics
Problem
Find the complement of
X
X
X
given that: a.
U
=
{
the 7 colours of the rainbow
}
U = \{\text{the 7 colours of the rainbow}\}
U
=
{
the 7 colours of the rainbow
}
and
X
=
{
red, indigo, violet
}
X = \{\text{red, indigo, violet}\}
X
=
{
red, indigo, violet
}
b.
U
=
{
x
∈
Z
∣
−
5
≤
x
≤
5
}
U = \{x \in \mathbb{Z} \mid -5 \le x \le 5\}
U
=
{
x
∈
Z
∣
−
5
≤
x
≤
5
}
and
X
=
{
−
4
,
−
1
,
3
,
4
}
X = \{-4, -1, 3, 4\}
X
=
{
−
4
,
−
1
,
3
,
4
}
c.
U
=
{
x
∈
Q
}
U = \{x \in \mathbb{Q}\}
U
=
{
x
∈
Q
}
and
X
=
{
x
∈
Q
∣
x
<
−
8
}
X = \{x \in \mathbb{Q} \mid x < -8\}
X
=
{
x
∈
Q
∣
x
<
−
8
}
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