Question

Determinati numarul N= 2^41-2^42-2^39.

Answer 1

$2^{41}-2^{42}-2^{39} = 2^{39}(2^2-2^3-1) = 2^{39}(4-8-1) = 2^{39}\cdot(-5) = \\ = -5\cdot2^{39} = \ -2 748 779 069 440$