1 |
2 |
x |
1-x |
OM |
1 |
2 |
OA |
OB |
1 |
2 |
n-1 |
i=1 |
i |
n |
|
OM |
1 |
2 |
OA |
OB |
1 |
2 |
1 |
2 |
y1+y2 |
2 |
1 |
2 |
1 |
2 |
x1 |
1-x1 |
1 |
2 |
x2 |
1-x2 |
1 |
2 |
1 |
2 |
x1 |
1-x1 |
1 |
2 |
1-x1 |
x1 |
1 |
2 |
1 |
2 |
n-1 |
i=1 |
i |
n |
1 |
n |
2 |
n |
n-1 |
n |
n-1 |
n |
n-2 |
n |
1 |
n |
1 |
n |
n-1 |
n |
2 |
n |
n-2 |
n |
n-1 |
n |
1 |
n |
| ||
(n-1)个 |
n-1 |
2 |
1 |
(Sn+1)(Sn+1+1) |
4 |
(n+1)(n+2) |
1 |
n+1 |
1 |
n+2 |
2 |
3 |
1 |
3 |
1 |
4 |
1 |
4 |
1 |
5 |
1 |
n+1 |
1 |
n+2 |
2 |
3 |
1 |
3 |
1 |
n+2 |
2n |
n+2 |
2n |
n+2 |
n+2 |
2 |
4n |
(n+2)2 |
4n |
n2+4n+4 |
4 | ||
n+
|
4 |
n |
4 | ||
n+
|
4 |
4+4 |
1 |
2 |
1 |
2 |
1 |
2 |
3 |
1 |
x |
1 |
y |
1-2x |
9 |
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