求高手解答!!!!!!!

2025-01-01 05:58:10
推荐回答(2个)
回答1:

1 D 2 A 3 B 4 C 5 B
6: 7
7: 1
8: 0
9 C=0
10 (2n-1)/n(n-1)

回答2:

D,A,B,C,B,7,4,0,0,(-1)^(n-1)/n