1/2+1/6+1/12+1/20+1/30+1/42+1/56=1-1/2+1/2-1/3+1/3-1/4+1/4-1/5+1/5-1/6+1/6-1/7+1/7-1/8=1-1/8=7/8这一步=1-1/2+1/2-1/3+1/3-1/4+1/4-1/5+1/5-1/6+1/6-1/7+1/7-1/8怎么会得到这步=1-1/8
来源:学生作业帮助网 编辑:作业帮 时间:2024/09/14 17:34:16
xTr@~+4 $Cx} 0 NkZ)=j)"bv\
z,߷a
ia ßDdUXc""=Ka5.îZyU;kUap^iF3i#>
=jxT_~?xG)(ʔ(!9 r1!"K "ɲJ
^DTb.!刻OQ)NXL'\&$ʂ3]*w/ѬZ:n872`>w'ӝlqX{ߍp]Z˿y;F
)E]{à3;T˳@an )z1HA1s191 ++* H%qrf#Z1#Z1u#Z 7L&(FU/]dWpIM