题目内容

计算:
(1-
1
22
)×(1-
1
32
)
=______;
(1-
1
22
)×(1-
1
32
)×(1-
1
42
)
=______;
(1-
1
22
)×(1-
1
32
)×…×(1-
1
92
)×(1-
1
102
)
=______;
(1-
1
22
)×(1-
1
32
)×…×(1-
1
(n-1)2
)×(1-
1
n2
)
=______.
(1-
1
22
)×(1-
1
32
)=
3
4
×
8
9
=
2
3
;
(1-
1
22
)×(1-
1
32
)×(1-
1
42
)=
2
3
×
15
16
=
5
8
=
4+1
2×4
;
(1-
1
22
)×(1-
1
32
)×(1-
1
42
)×(1-
1
52
)=
5
8
×
24
25
=
3
5
=
5+1
2×5
;
依此类推:(1-
1
22
)×(1-
1
32
)×…×(1-
1
92
)×(1-
1
102
)=
10+1
2×10
=
11
20
;
(1-
1
22
)×(1-
1
32
)×…×(1-
1
(n-1)2
)×(1-
1
n2
)=
n+1
2n
.
故答案为:
2
3
;
5
8
;
11
20
;
n+1
2n
练习册系列答案
相关题目

违法和不良信息举报电话:027-86699610 举报邮箱:58377363@163.com

精英家教网