Question

S=1+2+3+4+...............................+50
cum facem ca sa rezolvam??????????????

Answer 1

Folosim formula lui Gauss:
n*(n+1) /2
50*51 /2
Se simplifica 50 si 2 prin 2 si ramane:
25*51= 1275

Answer 2

[tex]S=1+2+3+....+50 \\ \\ S= \frac{50(50+1)}{2} \\ \\ S=25*51 \\ \\ \boxed{S=1275}[/tex]