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Se considera numarul intreg:
a=(75+76+77+....+999) : (-1-2-13....-74)
Calculati modul din numarul a.
Dau coroana!


Răspuns :

a=(75+76+77+....+999) : (-1-2-3....-74)=
=[(74+1)+74+2)+(74+3)+....(74+925)]:(-74
×75/2)=
=(74*925+925×926/2):(-37×75)=
=(74*925+925×463):(-37×75)=
=925×(74+463):(-37×75)=
=(925×537):(-37×75)=
=-179
IaI=I-179I=179