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2ori(1+2+3+....+999)+1000.c.p.....Ajutati-ma!!!


Răspuns :

1+2+3+...+999=999(999+1)/2=999x500=499500
2x499500+1000=
999000+1000=
1000000
2* (999*1000):2 +1000= 999*1000+1000= 1000(999+1)= 1000*1000