Respostas

2014-06-29T00:52:44-03:00
A) 3x² ≥ 8 => x² ≥ 8/3 => x ≥ √8/√3 => x = 2√2/√3 (racionalizando):
x ≥ 2√2.√3
       √3.√3
x ≥ 2√6
        3
1 5 1