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We live and use numbers ...
But we do not always understand what these figures are?
1. Natural numbers ..
In Science, the symbol N
N = 1 2 3 4 5 ....
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2. Whole numbers ..
In Science, the symbol Q
Q = all natural numbers + 0 + natural numbers with the sign "-"
Q = ........ -5 -4 -3 -2 -1 0 1 2 3 4 5 ............
-------------------------------------------------- -------------------------------------
3. Rational numbers ..
In Science they are denoted by the symbol of R
R = Q / N
The sign of a rational number is that you can write it in the form of an infinite periodic fraction
For example:
R = 1/3 = 0.3333 .. = 0 (3)
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4. irRational numbers ..
In Science they are denoted by the symbol of I
A sign of an irrational number is that you can not write it as an infinite periodic fraction R = Q / N
For example:
- pi = 3.14 ...
- exp = 2.71...
- In addition ... In Science there are so-called "convergent series", for example the Taylor series, the Fourier expansion ... These are also irrational numbers, but it is difficult to show them
==================================================
All these numbers in Science are called "real" .....
Besides...
In science there are "complex numbers" ....
==========================================================
The topic will be continued, if interested ...
But we do not always understand what these figures are?
1. Natural numbers ..
In Science, the symbol N
N = 1 2 3 4 5 ....
-------------------------------------------------- -------------------------------------
2. Whole numbers ..
In Science, the symbol Q
Q = all natural numbers + 0 + natural numbers with the sign "-"
Q = ........ -5 -4 -3 -2 -1 0 1 2 3 4 5 ............
-------------------------------------------------- -------------------------------------
3. Rational numbers ..
In Science they are denoted by the symbol of R
R = Q / N
The sign of a rational number is that you can write it in the form of an infinite periodic fraction
For example:
R = 1/3 = 0.3333 .. = 0 (3)
-------------------------------------------------- -------------------------------------
4. irRational numbers ..
In Science they are denoted by the symbol of I
A sign of an irrational number is that you can not write it as an infinite periodic fraction R = Q / N
For example:
- pi = 3.14 ...
- exp = 2.71...
- In addition ... In Science there are so-called "convergent series", for example the Taylor series, the Fourier expansion ... These are also irrational numbers, but it is difficult to show them
==================================================
All these numbers in Science are called "real" .....
Besides...
In science there are "complex numbers" ....
==========================================================
The topic will be continued, if interested ...
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