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What are the hierarchy of real numbers?
Starting at the top, we have the real numbers. The rational numbers is a subset of the reals. So are the irrational numbers. Now some rationals are integers so that is a subset of the rationals. Then a subset of the integers is the whole numbers. The natural numbers is a subset of those.
Diff kind of real numbers?
Natural (or counting) numbers Integers Rationals Irrationals Transcendentals
What are subsets of rational numbers?
There are an infinite number of subsets: All rationals other than 1 All rationals other than 2, etc All rationals other than 1.1 All rationals other than 2.1, etc, etc. All integers
The number -4 is what set of numbers?
The number -4 belongs to the set of all integers. It also belongs to the rationals, reals, complex numbers.
Why aren't fractions only rational numbers?
Since rational numbers are expressed as a/b where a & b are integers, in a sense fractions & rationals means the same thing. Integers may be considered fractions with denominators of 1 or other improper fractions. In any case, most real numbers are irrational; the rationals are just one type of real number.
What set of numbers does -23 belong to?
Integers, rationals, reals, complex numbers, etc.
-30 belongs to what family of the real numbers?
Negative integers, rationals and real numbers
What are the hierarchy of real numbers?
Starting at the top, we have the real numbers. The rational numbers is a subset of the reals. So are the irrational numbers. Now some rationals are integers so that is a subset of the rationals. Then a subset of the integers is the whole numbers. The natural numbers is a subset of those.
Diff kind of real numbers?
Natural (or counting) numbers Integers Rationals Irrationals Transcendentals
Are all rationals numbers integers?
no, a rational number can also be a fraction or decimal
Which subsets of numbers cannot be irrational?
Integers, rationals. Also all subsets of these sets eg all even numbers, all integers divided by 3.
Is the cardinality of an infinitely countable set the same as the rational numbers?
Yes. There is an injective function from rational numbers to positive rational numbers*. Every positive rational number can be written in lowest terms as a/b, so there is an injective function from positive rationals to pairs of positive integers. The function f(a,b) = a^2 + 2ab + b^2 + a + 3b maps maps every pair of positive integers (a,b) to a unique integer. So there is an injective function from rationals to integers. Since every integer is rational, the identity function is an injective function from integers to rationals. Then By the Cantor-Schroder-Bernstein theorem, there is a bijective function from rationals to integers, so the rationals are countably infinite. *This is left as an exercise for the reader.
Name the sets of numbers to which -28 belong?
-28 belongs to: Integers, which is a subset of rationals, which is a subset of reals, which is a subset of complex numbers.
Name set which -10 belongs Ex-whole integers rational?
Negative integers, integers, negative rationals, rationals, negative reals, reals, complex numbers are some sets with specific names. There are lots more test without specific names to which -10 belongs.
What are subsets of rational numbers?
There are an infinite number of subsets: All rationals other than 1 All rationals other than 2, etc All rationals other than 1.1 All rationals other than 2.1, etc, etc. All integers
The number -4 is what set of numbers?
The number -4 belongs to the set of all integers. It also belongs to the rationals, reals, complex numbers.
Are all real numbers a rational numbers?
Yes. Rational numbers are numbers that can be written as a fraction. All rationals are real.
