👤
EnglishzzBoi
a fost răspuns

S1= 1/2 + 1/6 + 1/12 + 1/20 + ... + 1/90
"/"= supra
Va rog, dau coroana !

Răspuns :

Danamocanu71
S=1/2+1/6+1/12+1/20+...+1/90
S=1/1·2+1/2·3+1/3·4+1/4·5+...+1/9·10
S=1/1-1/2+1/2-1/3+1/3-1/4+1/4-1/5+...+1/9-1/10
S=1/1-1/10
S=9/10

Alte intrebari