c |
a |
b |
a |
b |
c |
c |
b |
c |
a |
着 |
c |
a |
着 |
c |
(t-1)2+1+(c-2t)2 |
5t2-14t+11 |
a |
着 |
a |
11 |
着 |
5 |
a |
着 |
a |
着 |
着 |
a |
着 |
a |
7 |
5 |
24 |
5 |
7 |
5 |
a |
着 |
4 |
c |
7 |
5 |
4 |
c |
c |
c |
c |
a |
着 |
7 |
5 |
14 |
5 |
2 |
5 |
1 |
5 |
着 |
c |
| ||||||||
|
OC |
OA |
OB |
A.
| B.
| C.
| D.
|
PA |
PB |
10 |
CA |
CB |
CA |
CB |
x |
3 |
y |
1 |
2 |
| ||
2 |
a |
x |
y |
b |
x |
y |
a |
b |
AB |
n |
n |
AC |
n |
BC |
A.-2 | B.2 | C.0 | D.2或-2 |
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