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A=1+2+3+....+100+81x106

Răspuns :

[tex]1+2+3+...+100= \frac{100*101}{2} =5050 \\ 5050+81*106=5050+8586=13636 \\ Bafta Dan! Sponsor .principal. UEFA.[/tex]
A=1+2+3+....+100+81*106
A=100*(100+1):2+81*106
A=100*101:2+81*106
A=50*101+81*106
A=5050+8586
A=13636