4 |
2 |
1 |
3 |
a |
3 |
a2 |
1 |
a3 |
3 | 2 |
1 |
a |
3 | 2 |
3 |
a |
3 |
a2 |
1 |
a3 |
3a2+3a+1 |
a3 |
a3+3a2+3a+1 |
a3 |
a+1 |
a |
1 |
a |
3 | 2 |
1 |
1+x |
1 |
1+x |
1 |
1+x |
1 |
1+x |
A.①③ | B.②④ | C.①④ | D.②③ |
|
1 |
x |
1 |
x2 |
1 |
x3 |
A.19 | B.94 | C.0 | D.无法计算 |
23-1 |
23+1 |
33-1 |
33+1 |
1993-1 |
1993+1 |
2003-1 |
2003+1 |
A.1 | B.3 | C.6 | D.27 |
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