Question

a)={x ∈ N \ 17 < x ≤ 24}

b)={x ∈ N* \ 15 ≤ x ≤ 20 }

c)={x ∈ N \ 90 ≤ x < 100}

d)={các số chẵn nhỏ hơn 10}

Answer 1

a)\(\left\{18;19;...;24\right\}\)

b)\(\left\{15;16;17;...20\right\}\)

c)\(\left\{90;91;92;...99\right\}\)

d)\(\left\{0;2;4;6;8\right\}\)