. |
x~(a1)(a2)(a3)…(an-1)(an) |
. |
2~(-1)(3)(-2)(1) |
1 |
1-ak |
. |
2~(a1)(a2)(a3)…(a3n-2)(a3n-1)(a3n) |
2 |
7 |
2 |
7 |
. | ||||||||||
t~(
|
lim |
n→∞ |
dn |
dn+1 |
. |
x~(1)(-2)(3)(-6) |
1 |
2 |
1 |
2 |
1 |
1-an |
1 |
1-an+1 |
1 | ||
1-
|
1-an |
-an |
1 |
1-an+2 |
1 | ||
1+
|
. |
2~(a1)(a2)(a3)…(a3n-2)(a3n-1)(a3n) |
1 |
2 |
1 |
2 |
1 |
2 |
1 |
2 |
1-8n |
1-8 |
2 |
7 |
2 |
7 |
C | 1n |
C | 2n |
C | 3n |
C | 4n |
C | nn |
| ||||||||
t |
[
| ||||||||||
t |
(1+t)n-1 |
t |
lim |
n→∞ |
dn |
dn+1 |
lim |
n→∞ |
(1+t)n-1 |
(1+t)n+1-1 |
|
lim |
n→∞ |
dn |
dn+1 |
|
lim |
n→∞ |
Sn |
Sn+1 |
lim |
n→+∞ |
Sn+1 |
Sn |
A.0<q<1 | B.0<q≤1 | C.q>1 | D.q≥1 |
1 |
2 |
a |
xn |
a |
lim |
n→∞ |
1 |
2 |
lim |
n→∞ |
8 |
3 |
lim |
n→∞ |
1 |
3 |
1 |
9 |
1 |
27 |
1 |
3n |
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