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calculati suma nr. naturale de la 1 la 100

Răspuns :

   
[tex]\displaystyle \\ \text{Aplicam formula lui Gauss} \\ \\ 1+2+3+4+5+ \cdots+100 = \frac{100(100+1)}{2} = 50 \times 101 = \boxed{5050} [/tex]



1+2+3+...+100=100(100+1):2=100x101:2=5050