(2n+2)!/(2n)!
答案:2 悬赏:0
解决时间 2021-01-20 18:11
- 提问者网友：一抹荒凉废墟
- 2021-01-19 23:44
(2n+2)!/(2n)!
最佳答案
- 二级知识专家网友：污到你湿
- 2021-01-20 00:01
!是阶乘符号
N!=1*2*3*...*N
故
(2n+2)!/(2n)!
=[(2n+2)(2n+1)(2n)!]/(2n)!
=(2n+2)(2n+1)
=4n²+6n+2
N!=1*2*3*...*N
故
(2n+2)!/(2n)!
=[(2n+2)(2n+1)(2n)!]/(2n)!
=(2n+2)(2n+1)
=4n²+6n+2
全部回答
- 1楼网友：时间的尘埃
- 2021-01-20 01:28
解：
(2n+2)!/(2n)!
=(2n!)(2n+1)(2n+2)/(2n!)
=(2n+1)(2n+2)
=4n^2+6n+2
(2n+2)!/(2n)!
=(2n!)(2n+1)(2n+2)/(2n!)
=(2n+1)(2n+2)
=4n^2+6n+2
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