Matematică
MaryDiana
2015-11-10 20:12:30
Efectuand calculul : ( 3/2+4/3+5/4+....+1909/1908) - ( 1/2+1/3+1/4+...+1/1908 ) veti obtine anul in care a aparut automobilul Tin Lizzy
Răspunsuri la întrebare
Hardwell
2015-11-11 01:46:28

(3/2+4/3+....1909/1908)-(1/2+1/3+....+1/1908)= (1/2+2/2+1/3+3/3+...+1/1908+1908/1908)-(1/2+1/3+...+1/1908) 1/2+1/3+....+1/1908+ 1+1+....+1-(1/2+1/3+...+1/1908)=1*1907=1907  |_______________________________|                          =0

Ad3l1nutzu
2015-11-11 01:47:43

 ( 3/2+4/3+5/4+....+1909/1908) - ( 1/2+1/3+1/4+...+1/1908 ) 2/2+3/3+4/4+...+1098/1098=1+1+...+1 ( de 1907 ori) =1907

Adăugați un răspuns