Question

representar n reta real os intervalos ] -1, 3] = {x ∈ IR | -1 < x ≤ 3}

Answer 1

$\triangleleft\text{---------} \underset{1}{\mathop{\circ}}\star\star\star\star\star\star\star\star\star\star\star\star\star\underset{3}{\mathop{\bullet}}\text{---------}\triangleright$