Question

Determinati multimile: A= {x | x € lui N, x | 18 si 2x + 3 ≤ 15}​

Answer 1

Răspuns:

2x+3≤15 => 2x≤12 =>x≤6 => x € {0,1,2,3,4,5,6}

x|18 => x € {1,2,3,6}

A={1,2,3,6}