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Efectuați :
2006 2005 2004 2003
2 - 2 -2 -2


Răspuns :

2²⁰⁰⁶-2²⁰⁰⁵-2²⁰⁰⁴-2²⁰⁰³=
=2²⁰⁰³×(2³-2²-2¹-2⁰)=
=2²⁰⁰³×(8-4-2-1)=
=2²⁰⁰³×1=
=2²⁰⁰³
= 2^2003 (2^3 -2^2 - 2 - 1) = 2^2003 x (8-4-3) =2^2003 x 1 = 2^2003