搜题请搜索小程序“爱下问搜题”
问题 填空题
(1+
5
1
)(1+
5
2
)(1+
5
3
)(1+
5
4
)…(1+
5
10
)
(1+
6
1
)(1+
6
2
)(1+
6
3
)(1+
6
4
)…(1+
6
8
)
=______．
答案

(1+
5
1
)(1+
5
2
)(1+
5
3
)(1+
5
4
)…(1+
5
10
)
(1+
6
1
)(1+
6
2
)(1+
6
3
)(1+
6
4
)…(1+
6
8
)
，

=

6
1
×
7
2
×
8
3
×…×
15
10
7
1
×
8
2
×
9
3
×…×
14
8
，

=

6×7×8×…×15
1×2×3×…×10
7×8×9×…×14
1×2×3×…×8
，

=

6×7×8×…×15
1×2×3×…×10
×
1×2×3×…×8
7×8×9×…×14
，

=

6×15
9×10
，

=1．

故答案为：1．

选择题

    the project as planned, we’ll have to work two more hours a day.

A．To complete

B．Complete

C．Completing

D．Completed
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单项选择题

火中取栗：坐享其成

A．玉石俱焚：磨杵成针
B．大动干戈：偃旗息鼓
C．殚精竭虑：心急如焚
D．旗开得胜：势不两立
查看答案