1 |
2 |
1 |
2 |
1 |
2 |
1 |
2 |
p |
2 |
1 |
2 |
|
k |
2 |
y1 |
x1-4 |
y2 |
x2-4 |
y1 |
x1-4 |
y2 |
x2-4 |
y1x2-4y1+y2x1-4y2 |
(x1-4)(x2-4) |
y1
| ||||||||
(x1-4)(x2-4) |
(y1+y2)(
| ||||
(x1-4)(x2-4) |
A.
| B.-
| C.
| D.-
|
A.1 | B.-3 | C.3 | D.2 |
A.2 | B.
| C.-2 | D.-
|
3 |
A.135° | B.120° | C.60° | D.45° |
π |
6 |
π |
3 |
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