n!/(n+1)!=(1×2×······×n)/(1×2×······×n×(n+1))=1/(n+1)
n的n次方÷n的阶乘等于多少怎么约的？还有(1+n)的n次方除以n的n次方等于多少？
n!/(n+1)!=(1×2×······×n)/(1×2×······×n×(n+1))=1/(n+1)
n的n次方÷n的阶乘等于多少怎么约的？还有(1+n)的n次方除以n的n次方等于多少？名师互学网 版权所有 (c)2021-2022 ICP备案号：晋ICP备2021003244-6号
