1 |
2 |
x |
1-x |
OM |
1 |
2 |
OA |
OB |
1 |
2 |
1 |
n |
2 |
n |
n-1 |
n |
1 |
12 |
OM |
1 |
2 |
OA |
OB |
1 |
2 |
x1+x2 |
2 |
1 |
2 |
x1 |
1-x1 |
x2 |
1-x2 |
y1+y2 |
2 |
1 |
2 |
1 |
2 |
1 |
n |
2 |
n |
n-1 |
n |
n-1 |
n |
n-2 |
n |
1 |
n |
n-1 |
2 |
1 |
(Sn+1)(Sn+1+1) |
4 |
(n+1)(n+2) |
1 |
n+1 |
1 |
n+2 |
2 |
3 |
1 |
n+1 |
1 |
n+2 |
4 |
2×3 |
4 |
3×4 |
4 |
(n+1)(n+2) |
1 |
2 |
1 |
3 |
1 |
3 |
1 |
4 |
1 |
n+1 |
1 |
n+2 |
1 |
2 |
1 |
n+2 |
2n |
n+2 |
2n |
n+2 |
n |
2 |
4n |
n2+4n+4 |
4n |
n2+4n+4 |
4 | ||
n+
|
4 |
4+4 |
1 |
2 |
1 |
2 |
AB |
AC |
A.
| B.-
| C.
| D.-
|
a |
b |
a |
b |
a |
b |
A.-2 | B.2 | C.
| D.-
|
a |
1 |
2 |
b |
a |
b |
A.-1或2 | B.
| C.-
| D.2 |
a |
b |
a |
b |
A.-
| B.-3 | C.0 | D.
|
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