Question

1004+2(1+2+3+...+1003) aratati ca urmatoarele nr .sunt patrate perfecte

Answer 1

1004+2(1+2+3+...+1003)=
=1004+2[1003(1+1003):2]=
=1004+2(1003×1004:2)=
=1004+2(1003×502)=
=1004+2×503506=
=1004+1007012=
=1008016=1004² ⇒ patrat perfect 

Answer 2

1004+2(1+2+3+...+1003)=
=1004+2·1003·1004:2
=1004+1003·1004
=1004(1+1003)
=1004·1004
=1004²