有道数学真题黄金解答pdf

& gt1+1/2+1/3+1/4+(1/6+1/6)+(1/9+1/9+1/9)+(1/12+1/12+1/12)

=1+1/2+1/3+1/4+1/3+1/3+1/4

=3

a = 1+1/2+1/3+1/4+...+1/11+1/12

& lt1+1/2+(1/3+1/3+1/3)+(1/6+1/6+1/6)+(1/9+1/9+1/9+1/9)

=1+1/2+1+1/2+4/9

=3+4/9

a的整数部分是3。