3 |
a |
b |
a |
b |
3 |
a |
b |
a |
b |
a |
b |
a |
b |
a |
b |
k2+1 |
4k |
a |
b |
a |
b |
k2+1 |
4k |
k2+1 |
4k |
a |
b |
a |
b |
a |
b |
a |
b |
k2+1 |
4k |
3 |
a |
b |
a |
b |
3 |
a |
b |
| ||||
|
|
k2+1 |
4k |
k |
4 |
1 |
4k |
| ||
2 |
1 | ||
2
|
| ||
2 |
1 | ||
2
|
1 |
2 |
1 |
2 |
| ||
2 |
1 | ||
2
|
1 |
2 |
a |
b |
OC |
1 |
4 |
OA |
OD |
1 |
2 |
OB |
OA |
a |
OB |
b |
a |
b |
OM |
j |
OA |
j |
AB |
A. | B. | C. | D. |
BC |
3 |
BD |
AD |
AC |
AD |
a |
b |
a |
b |
3 |
a |
b |
1 |
3 |
a |
b |
a |
b |
a |
b |
a |
b |
7 |
3 |
OM |
OA |
OB |
OM |
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