1÷(1+1/2)÷(1+1/2)÷(1+1/4)÷.÷(1+1/18)÷(1+1/19)÷(1+1/20)注:

来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/24 09:26:51
1÷(1+1/2)÷(1+1/2)÷(1+1/4)÷.÷(1+1/18)÷(1+1/19)÷(1+1/20)注:1÷(1+1/2)÷(1+1/2)÷(1+1/4)÷.÷(1+1/18)÷(1+1/19

1÷(1+1/2)÷(1+1/2)÷(1+1/4)÷.÷(1+1/18)÷(1+1/19)÷(1+1/20)注:
1÷(1+1/2)÷(1+1/2)÷(1+1/4)÷.÷(1+1/18)÷(1+1/19)÷(1+1/20)
注:

1÷(1+1/2)÷(1+1/2)÷(1+1/4)÷.÷(1+1/18)÷(1+1/19)÷(1+1/20)注:
1÷(1+1/2)÷(1+1/3)÷(1+1/4)÷.÷(1+1/18)÷(1+1/19)÷(1+1/20)
=1÷(1+1/2)÷(1+1/3)÷(1+1/4)÷.÷(1+1/19)×(20/21)
=1÷(1+1/2)÷(1+1/3)÷(1+1/4)÷.×(19/20)×(20/21)
=1×(2/3)×(3/4)×(4/5)×.×(19/20)×(20/21)
=1×2/21
=2/21

=1除以3/2,除以4/3,除以5/4.......除以21/20.
=1乘以2/3,乘以3/4,乘以4/5,........乘以20/21
=2/21

原式=1÷3/2÷4/3÷5/4............÷21/20
=1*2/3*3/4*4/5...............*20/21
=2/21

1÷1+1÷1/2+1÷1+1÷1/2+1÷1+1÷4+……+1÷1+1÷18+1÷1+1÷19+1÷1+1÷20
1+0.5+0.5+1÷(4+……+20)
1+1+1÷204
2+1/204
2又204分之一