Răspuns :
[tex]1 + {2}^{0} + {2}^{1} + {2}^{2} + {2}^{3} + {2}^{4} + {2}^{5} = \\ 1 + 1 + 2 + 4 + 8 + 16 + 32 = 64 \\ {8}^{2} = 64 = > numarul = patrat \: perfect[/tex]
[tex]1 + {2}^{0} + {2}^{1} + {2}^{2} + {2}^{3} + {2}^{4} + {2}^{5} = \\ 1 + 1 + 2 + 4 + 8 + 16 + 32 = 64 \\ {8}^{2} = 64 = > numarul = patrat \: perfect[/tex]