Question

Cum se rezolva Exercițiul 3 helppp​

Answer 1

$A=\left\{x\:\in\:\mathbb{R}\:|\:2x-1 \geqslant 3 \right \}$

$2x - 1 \geqslant 3$

$2x \geqslant 3 + 1$

$2x \geqslant 4 \: | \div 2$

$x \geqslant 2$

$x \: \in \: [2, + \infty )$

$A= [2, + \infty )$