Question

fie A = {x apart R | | (2x+1)/3 | < 1}.
Determinati multimea A

Answer 1

$| \frac{2x +1}{3}|<1$

$-1< \frac{2x+1}{3}< 1 |\times3$

$-3<2x+1<3 |-1$

$-4<2x<2 |\div2$

$-2< x< 1$

$\:x\:\epsilon\:(-2,1)$