Răspuns:
[tex]a) \: \frac{ {( - 1)}^{3} - ( - 1)^{2} + ( - 1) }{ {( - 1)}^{2} + ( - 1) + 1 } = \frac{ - 1 - 1 - 1}{1 - 1 + 1} = \frac{ - 3}{1} = - 3[/tex]
[tex]b) \: \frac{0 - 0 + 0}{0 + 0 + 1} = \frac{0}{1} = 0[/tex]
[tex]c) \: \frac{ \frac{1}{8} - \frac{1}{4} + \frac{1}{2} }{ \frac{1}{4} + \frac{1}{2} + 1 } = \frac{ \frac{1 - 2 + 4}{8} }{ \frac{1 + 2 + 4}{4} } = \frac{3}{8} \times \frac{4}{7} = \frac{3}{14} [/tex]
