Question

A=[x€R| 2x≤4]
Mulțimea A este egalã cu intervalul...

Answer 1

$2x \leq 4 \Rightarrow x \leq 2 \Rightarrow x \in (-\infty;2] \Rightarrow \boxed{A=(-\infty;2]}.$

Answer 2

2x<_4=>x<_4÷2=>x<_2=>x€{-○○;2} A=(-○○;2].