How can set [2,4,6,8] be represented by description?

How can set [2,4,6,8] be represented by description?

{2,4,6,8}={x|x=2k,k=1,2,3,4}

The set {2,4,6,8} is represented by description method?

{A|A=2n,(n∈(1,2,3,4))}

Set {2, 4, 6, 8 }It should be ()
A. All of the above are true for {x | x = 2K, K ∈ Z} B. {x | x = 2K, K ∈ n} C. {x | x = 2K, K ∈ n *} D

∵2=2×1，4=2×2，6=2×3，8=2×4，… The set {2, 4, 6, 8 }=So the answer is C

Is ABC a monomial, why, if so, what are its coefficients and times?
Is 4 / a a monomial? Why, if so, what are its coefficients and times?
-What are the coefficients and times of X & # 178?
The coefficients and times of a and B?
What are the coefficients and times of (- 2) & # 179; a and # 179?
What are the coefficients and times of three fourths of XY?
7y-3xy & # is the sum of several terms, and what are the coefficients?
π R & # 178; - π R & # 178; is the sum of several terms? What are the coefficients?
3x & # 178; - XY + Y & # 179; is the sum of several terms? What are the coefficients?
A & # 179; - A & # 178; B + AB & # 178; - B & # 179; is the sum of several terms? What are the coefficients?
Please answer carefully. Thank you very much

Is ABC a binomial? Why, if so, what are its coefficients and times? Yes, the coefficients are: 1, times are: 3A, 4 / 3 is a binomial? Why, if so, what are its coefficients and times? Yes, the coefficients are: 1 / 4, times are: 1-x & # 178; the coefficients and times of ABC are - 1 and 2A & # 179; the coefficients and times of B are -

Is 4 / a monomial
RT
Why?

No, because a is in the denominator, this is a fraction, and the monomial is an integral, so it is not a monomial. (note on the first floor, the monomial is an integral, not a fraction!) landlord, you can see the Baidu Encyclopedia of monomial, which is very detailed

Is 2 of a plus 1 a monomial
Is the number with addition and subtraction in some molecules a monomial
If there are letters in the denominator, no matter how to add, subtract, multiply and divide, is it not a monomial

Monomials are expressions that represent the product of numbers or letters, such as 5a, 36, 89B
2 / a plus 1 is an integral

Is 2 / 3 (x + 1) a monomial

（2/3）（x + 1) = (2/3)x + 2/3
It's not a monomial, it's a binomial

Is 2A + B 3 / 3 a monomial? Is X-1 2 / 2 a monomial? Why?

An algebraic formula composed of the product of a number and a letter or the product of a letter and a letter is called a monomial (a single number or letter is also a monomial). The number factor in a monomial is called the coefficient of the monomial. The sum of the exponents of all letters is called the number of times of the monomial
Therefore, both should not be monomials

Is 2 and 1 / 3 monomial?

No, it's a monomial if it's not connected by a plus sign

Write a binomial with coefficient 3 and letters A and B

3ab^4 3a^2b^4 3a^3b^4 3a^4b 3a^4b^2 3a^4b^3 3a^4b^4