Let m = {x | x = 2K + 1, K ∈ n +}, n = {x | x = 2k-1, K ∈ n +}, then the relationship between M and N is?

Let m = {x | x = 2K + 1, K ∈ n +}, n = {x | x = 2k-1, K ∈ n +}, then the relationship between M and N is?

Let m = {x x = 2K1 + 1, K1 ∈ n +}, n = {x x = 2k2-1, K2 ∈ n +},
And K1 = k2-1,
Then, M = {x | x = 2k2-2 + 1 = 2k2-1, K2 ∈ n +} = n,
So, M = n