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exxxxxx 2 b c va rrrrooog mmmmmuuuuulllltttttttt dau ccccccooooorrrrroooooaaannna

Exxxxxx 2 B C Va Rrrrooog Mmmmmuuuuulllltttttttt Dau Ccccccooooorrrrroooooaaannna class=

Răspuns :

DMXTroller
3+6+9+...+90 scriem ca
3(1+2+3+...+30) in paranteza facem suma lui Gaus
3(30×31:2)=3×465=1395

iar celalalt subpunct nu se intelege

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