Probability of real numbers:

Real numbers are a general term for rational numbers and irrational numbers, where irrational numbers are infinite acyclic decimals and rational numbers include integers and fractions. Mathematically, real numbers are defined as the number of corresponding points on the number axis. Real and imaginary numbers * * * together form a complex number.

The concept of imaginary number:

Imaginary number refers to complex number other than real number, and imaginary number with real part of 0 is called pure imaginary number.

In mathematics, imaginary numbers are numbers in the form of a+b*i, where a and b are real numbers, b≠0, i? = - 1。 The word imaginary number was founded by Descartes, a famous mathematician in the17th century, because the concept at that time thought it was a non-existent real number. Later, it was found that the real part A of the imaginary number a+b*i can correspond to the horizontal axis and the imaginary part B can correspond to the vertical axis on the plane, so that the imaginary number a+b*i can correspond to the points (a, b) on the plane.