The proper methods are as follows: (1) the set composed of all nonnegative even numbers; (2) the set composed of all positive integers less than 20 which are both odd and prime numbers; (3) the set composed of the first-order factor of the square of x-16; (4) the set composed of all points on the line y = X····

The proper methods are as follows: (1) the set composed of all nonnegative even numbers; (2) the set composed of all positive integers less than 20 which are both odd and prime numbers; (3) the set composed of the first-order factor of the square of x-16; (4) the set composed of all points on the line y = X····

(1) {x|x=2n,n∈N}
(2) {3,5,7,11,13,17,19}
(3) {x+4,x-4}
(4) {(x,y)|y=x,x∈R,y∈R}

How can even numbers be represented by description? How can odd numbers be represented by description? What are the other kinds of numbers used to represent? What are the representation methods?
Compulsory one P3

The set of even numbers {x | x = 2K, K ∈ Z}
The set of odd numbers {x | x = 2K + 1, K ∈ Z}

The following sets are represented by Description: (1) the set of odd numbers (2) the set of positive even numbers (3) the solution set of inequality x2 + 1 ≤ 0

{x/2x+1 x=Z}
{X/2X X=N*}
{X/X《-1/2 x=R}

How to express even number set and odd number set

Set of even numbers
{x|x=2n,n∈Z}
Set of odd numbers
{x|x=2n+1,n∈Z}
If you don't understand, please hi me, I wish you a happy study!