x2 |
16 |
y2 |
4 |
0-1 |
-1-3 |
1 |
4 |
|
(x1+x2)(x1-x2) |
16 |
(y1+y2)(y1-y2) |
4 |
x1+x2 |
2 |
y1+y2 |
2 |
y1-y2 |
y1+y2 |
2 |
16 |
kAB |
4 |
1 |
2 |
1 |
2 |
3 |
A.30° | B.60° | C.150° | D.120° |
A.x-2y+=40 | B.2x+y-7=0 | C.x-2y+3=0 | D.x-2y+5=0 |
A.3x-y-5=0 | B.3x+y-5=0 | C.3x-y+1=0 | D.3x+y-1=0 |
x |
a |
y |
b |
A.0 | B.1 | C.2 | D.3 |
| ||
2 |
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