Question

Determinati elementele multimii :

A={x aparine numerelor naturale N | 5x< 23}

Answer 1

A = {x ∈ ℕ⏐5x ≤ 23}

5x ≤ 23  

⇔  x ≤ 23/5

⇔  x ≤ 4.6

⇒  A = {0; 1; 2; 3; 4}