问题 填空题
计算:(1+
1
2
)×(1+
1
4
)×(1+
1
6
)×…×(1+
1
10
)×(1-
1
3
)×(1-
1
5
)×…×(1-
1
9
)
=______.
答案

(1+

1
2
)×(1+
1
4
)×(1+
1
6
)×…×(1+
1
10
)×(1-
1
3
)×(1-
1
5
)×…×(1-
1
9
)

=

3
2
×
5
4
×
7
6
×…×
9
8
×
11
10
×
2
3
×
4
5
×…
8
9

=

11
10

故答案为:

11
10

单项选择题 A3/A4型题
单项选择题