Question

elementele multimii A={x£N*|2x+3mai mic sau egal cu 9

Answer 1

A={x∈N*|2x+3≤9}

2x+3≤9

2x≤9-3

2x≤6

x≤6:2

x≤3

x∈{1,2,3}

A={1,2,3}