Răspuns:
B. 0
Explicație pas cu pas:
[tex]1-\frac{1}{2} +\frac{1}{2^2} -\frac{1}{2^3} = \\\\=1-\frac{1}{2} +\frac{1}{4} -\frac{1}{8} = \\\\=\frac{8}{8} -\frac{4}{8} +\frac{2}{8} -\frac{1}{8} =\\\\=\frac{8-4+2-1}{8} =\\\\=\frac{5}{8}[/tex]
Este fractie subunitare, deci are partea intreaga 0.
