intervalo para determinar as raízes: Nº grupo Equação Intervalo Gr 1 (senh + 1)(2 − 3 − 2)/10 [ −1, 4] Gr 2 senh − + 1/5 cos(2) [ −2.5, 2 ] Gr 3 (cosh − 6/5)(3 + − 1) [ −1, 2 ] Gr 4 3 − 3/2 cos 2 sen() [−2 , 2 ] Gr 5 senh − 3/2 cos 2 /5 [ −2, 2 ] Gr 6 3 − 2 + 3 − Τ 5 2 cosh (3) [ −1, 3, ] Gr 7 1 + − senh cosh (2)/5 [ −2, 2 ] Gr 8 (4 − 23 + Τ 3 2)sen(3x) [ −2, 2 ]