👤

Aflați raportul a/b, unde a= 1+2+3+.....2009, iar b=2009×55

Răspuns :

a=1+2+3+...........+2009=2009*2010/2=2009*1005  
b=2009*55

a/b=2009*1005/2009*55=1005/55=201/11