Question

Help . 2+4+6+...+100 =

Answer 1

Aceasta e suma lui Gauss.
2+4+6+...+100 =
Vom afla aceasta suma.
2x(1+2+3+...+50)=
2x(50+1)x50:2=
Vom afla operatia din paranteza..
2x51x50:2=
Vom afla impartirea.
2x51x25=
Vom afla 2x51
102x25=2550
Iar suma aceasta a fost aflata.

Answer 2

gaus super                  
1+2+3+4+.......................................................+100 =
1x(1+2+3+4+.................................................+100)-50=
50x101÷2=5050÷2=2525