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Calculati aplicand formula 1+2+........698

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Sara0207
698 x (698+1) : 2+698 x699:2=487 902 : 2= 243 951
[tex]\displaystyle 1+2+..+698= \frac{698(698+1)}{2} = \frac{698 \cdot 699}{2} = \frac{487902}{2} =243951[/tex]

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