Question

Determine A∩B, nos seguinte intervalo A = [-∞,2] e B = [-1, ∞]

Answer 1

A>>> ● - oo______________0_________2●
B>>> ●-1_____0_____________oo+●
A^B>>> ●-1_______________2●
A^B=A inter B.
A^B=[-1; 2]
Abraços.