tuliskan jalanya bro

K = {x|5≤x≤9, x ∈ bilangan asli}
K = {5, 6, 7 ,8, 9}
L = {x|7≤x≤13, x ∈ bilangan cacah}
L = {7, 8, 9, 10, 11, 12, 13}

K∪L = K gabungan L = {5, 6, 7, 8, 9, 10, 11, 12, 13}

maaf kalau salah, semoga membantu :)