Question

Subpunctul B va rog !!

Answer 1

Explicație pas cu pas:

$(1 + 2 + {2}^{2} + {2}^{3}) + {2}^{4}(1 +2 + {2}^{2} + {2}^{3}) + ... + {2}^{2003}( 1 + 2 + {2}^{2} + {2}^{3} ) = \\ (1 + 2 + {2}^{2} + {2}^{3} ) + (1 + {2}^{4} + {2}^{8 } + ... + {2}^{2003} ) \\ 15 + (1 + {2}^{4} + ... + {2}^{2003} )se \: divde \: cu \: 15$