1 |
n+1 |
1 |
n+2 |
1 |
n+3 |
1 |
3n |
A.
| B.
| ||||||||||
C.
| D.
|
1 |
(n+1)+1 |
1 |
(n+1)+2 |
1 |
(n+1)+3 |
1 |
3(n+1) |
1 |
n+1 |
1 |
n+2 |
1 |
n+3 |
1 |
3n |
1 |
3n+1 |
1 |
3n+2 |
1 |
3n+3 |
1 |
n+1 |
1 |
3n+1 |
1 |
3n+2 |
2 |
3n+3 |
|
1 |
4 |
A.9 | B.
| C.-9 | D.-
|
A.15 | B.6 | C.8 | D.9 |
1 |
x2+1 |
A.{y|y∈R} | B.{y|y∈R+} | C.{y|0≤y≤2} | D.{y|0<y≤1} |
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