a |
b |
a |
3 |
b |
a |
3 |
b |
AD |
BD |
a |
b |
x2 |
3 |
|
9m |
13 |
9m |
13 |
m |
26 |
m |
26 |
1 |
3 |
9m |
26 |
13 |
2 |
1 |
3 |
-
| ||
-
|
1 |
3 |
13 |
2 |
13 |
2 |
13 |
2 |
PA |
PB |
PC |
0 |
A.9:4:1 | B.1:4:9 | C.3:2:1 | D.1:2:3 |
A.13m/s | B.12m/s | C.17m/s | D.15m/s |
AB |
a |
b |
AC |
a |
b |
a |
a |
b |
a |
b |
a |
b |
A.(-5,-10) | B.(-4,-8) | C.(-3,-6) | D.(-2,-4) |
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