1/(32-1)+1/(52-1)+1/(72-1)+…+1/[(2n+1)2-1]+…=()
A.1/4
B.1
C.1/2
D.无法计算
:1 3 4 8 16 32 () A.64 B.66 C.72 D.74
1 3 4 8 16 32 () A.64B.66C.72D.74
8/9,-2/3,1/2,-3/8,() A.9/32 B.5/72 C.8/32 D.9/23
8/9,-2/3,1/2,-3/8,()。 A.9/32B.5/72C.8/32D.9/23
1,3,11,32,72,()A.82B.107C.138D.149
0,1,32,81,64,()A.32B.49C.52 D.36