Any set that contains -1.2, whether finite or infinite.
For example,
the set consisting of only -1.2 ie {-1.2},
the set consisting of -1.2 and 5 = {-1.2,5},
the set consisting of -1.2 and 3 and sqrt(17) = {-1.2,3,sqrt(17)}, and so on.
The set of numbers which 3 does not belong is the set of even numbers.
10 belongs to the set "natural numbers", but it can also belong to whole numbers, and rational numbers
The set of even numbers
Integers
WHole
mixed numbers
The set of numbers which 3 does not belong is the set of even numbers.
10 belongs to the set "natural numbers", but it can also belong to whole numbers, and rational numbers
Counting numbers
Irrational numbers.
The set of even numbers
The fraction ( \frac{12}{4} ) simplifies to 3, which is a whole number. Therefore, it belongs to the set of integers, as well as the set of rational numbers since it can be expressed as a fraction of two integers. Additionally, it is also part of the set of real numbers.
It belongs to any set that contains it: for example, {4.75, -12, pi, sqrt(5), 29}. It belongs to the set of integers which is a proper subset of rational numbers which is a proper subset of real numbers which is a proper subset of complex numbers. So -12 belongs to all the above sets.
It belongs to the set of prime numbers
rational and prime numbers
Rational and Real numbers
Integers