x2 |
a2 |
y2 |
b2 |
BP |
BM |
A.0<t<3 | B.0<t≤3 | C.0<t<
| D.0<t≤
|
|
2ba2 |
a2+b2 |
b(a2-b2) |
a2+b2 |
b(a2-b2) |
a2+b2 |
. |
BP |
b(a2-b2) |
a2+b2 |
. |
BM |
2ba2 |
a2+b2 |
b(a2-b2) |
a2+b2 |
BP |
BM |
. |
BP |
. |
BM |
. |
BP |
b(a2-b2) |
b2+a2 |
3b2 |
2b-3 |
3 |
2 |
3 |
2 |
3b2 |
2b-3 |
3 |
2 |
x2 |
4 |
y2 |
5 |
1 | ||
|
1 | ||
|
A.4 | B.2 | C.1 | D.
|
x2 |
4 |
1 |
|MF1| |
1 |
|MF2| |
5 |
A.-3 | B.-4 | C.5 | D.6 |
1 |
2 |
A.
| B.2 | C.
| D.4 |
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