A.数列1,3,5,7可表示为{1,3,5,7} | ||||
B.数列1,0,-1,-2与数列-2,-1,0,1是相同的数列 | ||||
C.数列{
| ||||
D.数列0,2,4,6,…可记为{2n} |
n+1 |
n |
k+1 |
k |
1 |
k |
1 |
an+1 |
A.2 | B.-
| C.-
| D.1 |
A.an=2n+3 | B.an=-n2+3n+1 | ||
C.an=
| D.an=(-1)n |
A.10 | B.11 | C.10或11 | D.12 |
2f(n)+n |
2 |
A.95 | B.97 | C.105 | D.192 |
A.an=5-n | B.an=6-2n | C.an=n+3 | D.an=2n+2 |
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