Question

2+3+4+...+50=

2+4+6+...+600=

Answer 1

2+3+4+..+50=1274
la a doua nu o stiu si trebuie sa plec la scoala.

Answer 2

2+3+...50=
50x51:2-1=1274

2+4+6+...600=
2x(1+2....+300)=
2x300x301:2=90300