+ 5!+...+n!的阶乘之和 defjiecheng_sum(n): ifn == 1:return1el ifn == 2:return3returnjiecheng_sum(n-1) + n * (jiecheng_sum(n-1)-jiecheng_sum(n-2))print(jiecheng_sum(4))
+2!+3!+4!+5!+...+n!的阶乘之和使⽤递归算法来计算1!+ 2!+ 3!+ 4!+ 5!+...+n!的阶乘之和 def jiecheng_sum(n):if n == 1:return 1 elif n == 2:return 3 return jiecheng_sum(n-1) + n * (jiecheng_sum(n-1)-jiecheng_sum(n-2))print(jiecheng_sum(4))