1/2 + 1/3 + 1/4 +1/5 + 1/6 + 1/7 + 1/8 + 1/9 + 1/10
= 5/6 + 1/4 + 1/5 + 1/6 + 1/7 + 1/8 + 1/9 + 1/10
= 13/12 + 1/5 + 1/6 + 1/7 + 1/8 + 1/9 + 1/10
= 77/60 + 1/6 + 1/7 + 1/8 + 1/9 + 1/10
= 29/20 + 1/7 + 1/8 + 1/9 + 1/10
= 223/140 + 1/8 + 1/9 + 1/10
= 481/280 + 1/9 + 1/10
= 1,828....+ 1/10
= 1,9289..........
1/2 + 1/3 + 1/4 + 1/5 + ... + 1/10 = a
= 1/2 + 1/3 + 1/4 + 1/5 + 1/6 + 1/7 + 1/8 + 1/9 + 1/10
= 1.928....
=> 1/2+1/3+1/4+1/5+...+1/10=1,928...