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PaulaBie
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Heii
11+22+33+...+110.
Urgeent ,merci, puncte multe

Răspuns :

Albastruverde12
11+22+33+...+110=11*1+11*2+11*3+...+11*10=11(1+2+3+...+10)=11*[tex] \frac{10*11}{2} [/tex] = 11*5*11=605.

11+22+33+...+110 = 11(1+2+3+....+10) = 11(10×11)/2 = 11 × 5 × 11 = 605


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