Question

Cum pot sa adun 1+2+3+4+...+1000
Va rog ma ajutaţi.

Answer 1

exista formula lui gauss
1+2+3+...n=n(n+1):2



1+2+3+...+1000=1000*1001:2=500500

Answer 2

$1+2+3+4+...+1000=\frac{1000(1000+1)}{2}=\frac{{1000}*1001}{2}= 500500$$\\ \boxed{\frac{n(n+1)}{2}}$