Question

Sa se determine elementele multimii A={x∈N | 2x+3≥5x-6}.

Answer 1

2x+3≥5x-6 ⇒ 3+6≥5x-2x ⇒ 3x≤9 ⇒ x≤3 ⇒ x∈{0,1,2,3} ⇒ A={0,1,2,3}