a) { -3, -2, -[tex]\sqrt{2}[/tex], -1, 0, 1, [tex]\sqrt{2}[/tex], 2, 3 }
b) { 0, [tex]\frac{1}{5}, \frac{1}{4}, \frac{1}{3}, \frac{1}{2}, \frac{2}{3}, \frac{3}{4}, \frac{4}{5}, 1[/tex] }
