a+3i |
1+2i |
lim |
n→∞ |
1 |
a |
1 |
a2 |
1 |
an |
A.
| B.
| C.-
| D.-
|
a+3i |
1+2i |
(a+3i)(1-2i) |
5 |
a+3i-2ai+6 |
5 |
a+6 |
5 |
3-2a |
5 |
a+3i |
1+2i |
a+6 |
5 |
3-2a |
5 |
|
lim |
n→∞ |
1 |
a |
1 |
a2 |
1 |
an |
lim |
n→∞ |
-
| ||||
1-(-
|
1 |
7 |
4 |
3 |
3 |
2 |
A.x=0 | B.x=1 | C.x=0或x=1 | D.x=0或x=-1 |
lim |
n→∞ |
1-t |
t |
A.(0,
| B.(0,
| C.(
| D.(
|
A.-
| B.-2 | C.-
| D.-3 |
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