👤
Gigibro
a fost răspuns

2+3+4+....+50=
1+2+3+....+500=
1+97+2+999+3+198=
1+2+3+.....+124=
2+4+6+....+600=
15+16+17+...+70=
PLS!!!

Răspuns :

Bobocdvd780

1+2+3+...+500=500x(500+1)÷2=500x501÷2=250x501=125250

1+2+3+...+124=124x(124+1)÷2=124x125÷2=62x125=7750

Alte intrebari