Răspuns :
(4+8+12+....+2012):(2+4+6+....+1006)=
=4(1+2+3+....+503): 2(1+2+3+....+503)=
=(4*503*504:2):(2*503*504:2)=
=(2012*504:2):(503*504)=
=(1006*504):(503*504)=
=(1006:503):(504:504)=
=2:1=2
=4(1+2+3+....+503): 2(1+2+3+....+503)=
=(4*503*504:2):(2*503*504:2)=
=(2012*504:2):(503*504)=
=(1006*504):(503*504)=
=(1006:503):(504:504)=
=2:1=2