Răspuns :
X= 1 + 2 + 3 +... +199
X=199+198+197+...+1
-----------------------------------
2•x = 199•200
X = 199•100 = 19 900
(Suma lui Gauss)
X=199+198+197+...+1
-----------------------------------
2•x = 199•200
X = 199•100 = 19 900
(Suma lui Gauss)