Question

1. 2+4+6+...+200=
2. 3+6+9+12+...+309=
3. 4+8+16+...444=
4. 5+10+15+20+...+630=
5. 6+12+18+...+180=
6. 7+14+27+...+210=


PRIN SUMA LUI GAOS​

Answer 1

Răspuns:

1. 2+4+6+100+200=312

2. 4+8+16+222+444=694

3. 5+10+15+20+315+630=995

4. 6+12+18+90+180=306

5. 7+14+27+105+210=363

Pe 2 nu l-am scris:

2. 3+6+9+12+154,5+309=493,5