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1×2×3×......×2017= ?

Răspuns :

1×2×3×...×2017
2=1×2
3=1×3
...
2017=1×2017
Dam factor comun pe 1
1×(1+2+3+...+2017)=
1×{[2017×(2017+1)]:2}=
1×[(2017×2018):2]=
1×(4070306:2)=
1×2,035,153=
2,035,153


Eu asa am invatat, daca nu e bine...scuze.