Question

Aratati ca nr x=1004+2+4+6+...+2006 este patrat perfect si calculati radical din x

Answer 1

calculam suma 2+4+6+..+2006=2(1+2+3+...+1003)=2x1003X1004/2=1003*1004
x=1004+1003*1004=1004(1+1003)=1004*1004=1004^2