Complex modulus in mathematics. The value of the positive square root of the sum of the squares of the real and imaginary parts of a complex number is called the module of the complex number. Absolute value is the distance from a point corresponding to a number on the exponential axis to the origin, which is represented by "||". |b-a| or |a-b| represents the distance between the point representing a and the point representing b on the number axis.
Extended data:
Nature of absolute value
1, the absolute value of any rational number is a number greater than or equal to 0, which is not negative.
2. Only one number whose absolute value is equal to 0 is 0.
3. There are two kinds of numbers whose absolute values are equal to the same positive number, and these two numbers are opposite or equal.
The absolute values of two opposite numbers are equal.
The absolute value of a positive number is itself.
6. The absolute value of a negative number is its reciprocal.
The absolute value of 7 and 0 is 0.
Complex number calculation rule
1 | z 1 z2 | = | z 1 | | z2 |
2、┃| z 1 |-| z2|┃≤| z 1+z2 |≤| z 1 |+| z2 |
3、z 1-z2| = | z 1z2|