Question

Urgent va rooogg ex 4​

Answer 1

Răspuns:

10, 11, 12, 13, 20, 21, 22, 30, 31, 40

Explicație pas cu pas:

a+b ≤ 4

a=1 -> 1+b ≤ 4

          b ≤ 3 => b ∈ {0; 1; 2; 3}

a=2 -> 2+b ≤ 4

           b ≤ 2 => b ∈ {0; 1; 2}

a=3 -> 3+b ≤ 4

           b ≤ 1 => b ∈ {0;1}

a=4 -> 4+b ≤ 4

          b ≤ 0 => b ∈ {0}

Deci numerele sunt:  10, 11, 12, 13, 20, 21, 22, 30, 31, 40