早教吧 育儿知识 作业答案 考试题库 百科 知识分享

(1+17)×(1+172)×(1+173)×…×(1+1718)×(1+1719)(1+19)×(1+192)×(1+193)×…×(1+1916)×(1+1917)=136231136231.

题目详情
(1+17)×(1+
17
2
)×(1+
17
3
)×…×(1+
17
18
)×(1+
17
19
)
(1+19)×(1+
19
2
)×(1+
19
3
)×…×(1+
19
16
)×(1+
19
17
)
=
136
231
136
231
▼优质解答
答案和解析
(1+17)×(1+
17
2
)×(1+
17
3
)×…×(1+
17
18
)×(1+
17
19
)
(1+19)×(1+
19
2
)×(1+
19
3
)×…×(1+
19
16
)×(1+
19
17
)

=
18×
19
2
×
20
3
×…×
35
18
×
36
19
20×
21
2
×
22
3
×…×
35
16
×
36
17

=
136
231

故答案为:
136
231