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Calculati: 7×2^1997-6×2^1996-2×2^1998

Răspuns :

7*2^1997-6*2^1996-2*2^1998=
2^1995*(7*2^2-6*2-2^3)=2^1995*(7*4-12-8)=2^1995*8=2^1995*2^3=2^1998