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CALCULATI
2^87+2^86+2^85


Răspuns :

2^87+2^86+2^85=2^85(2^2+2^1+2^0)=2^85 x (4+2+1)=2^85 x 7
2x87+2x86+2x85=
=2x(87+86+85)=
=2x258=
=516