Question

(6+12+18+24+........+600) LA PUTEREA A DOUA :(3+6+9+12+.......+300):(1+2+3+....+100)= VA ROG AJUTATI-MA E URGENT !

Answer 1

(6x1+6x2+6x3+6x4...6x600)^2=
[6x(1+2+3+4+.....+600)]^2=
(6x600x601:2)^2=
(6x300x601)^2=
(1800x601)^2=
1081800^2

3x1+3x2+3x3+3x4+....+3x300=
3x(1+2+3+4+...+300)=
3x300x301:2=
3x150x301=
450x301=
135450
1x1+1x2+1x3+1x4+.....+100=
1x(1+2+3+4+....+100)=
1x100x101:2=
1x50x101=
50x101=
5050