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ajutati-maaaaaaaaaaaaaaaa!!! (1+2+3+.......+2743):2743

Răspuns :

[tex]\displaystyle (1+2+3+...+2743):2743= \frac{2743(2743+1)}{2} :2743= \\ \\ = \frac{2743 \cdot 2744}{2} :2743= \frac{7526792}{2} :2743=3763396:2743=1372[/tex]