a |
b |
π |
3 |
a |
b |
b |
a |
b |
b |
a |
b |
b |
a |
b |
b |
a |
b |
b |
a |
b |
π |
3 |
a |
b |
a |
b |
π |
3 |
a |
b |
1 |
2 |
a |
b |
3 |
2 |
a |
b |
b |
a |
b |
a |
b |
b |
a |
b |
b |
b |
b |
b |
a |
b |
a |
a |
b |
b |
a |
b |
b |
b |
a |
b |
b |
(6
| ||||||
|6
|
3
| ||
3
|
a |
b |
b |
a |
b |
a |
b |
a |
b |
a |
b |
A.150° | B.90° | C.60° | D.30° |
a |
a |
b |
a |
b |
a |
b |
a |
b |
a |
b |
a |
b |
A.(-2,+∞) | B.(-2,
| ||||
C.(-∞,-2) | D.(-2,2) |
b |
a |
c |
a |
b |
c |
a |
a |
b |
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