a |
b |
c |
a |
b |
b |
a |
b |
c |
a |
b |
a |
b |
b |
sin22x+(1-cos2x)2 |
2(1-cos2x) |
4sin2x |
b |
a |
b |
a |
b |
c |
1 |
4 |
1 |
8 |
1 |
4 |
1 |
8 |
x2 |
9 |
y2 |
4 |
|PF1| |
|PF2| |
OA |
OB |
A.
| B.-
| C.3 | D.-3 |
p |
a |
b |
q |
c |
d |
a |
b |
c |
d |
p |
q |
a |
b |
c |
a |
b |
c |
A.M>N | B.M≥N | C.M<N | D.M≤N |
2 |
a |
AO |
AB |
AC |
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