a |
a |
b |
5
| ||
2 |
b |
b |
b |
A.(2,14) | B.(2,-
| C.(-2,
| D.(2,8) |
b |
b |
a |
b |
5
| ||
2 |
8+3y | ||
|
5
| ||
2 |
2 |
7 |
b |
2 |
7 |
b |
2 |
7 |
e1 |
e2 |
A.若实数λ1,λ2使λ1
| ||||||||
B.空间任一向量可以表示为
| ||||||||
C.对实数λ1,λ2,λ1
| ||||||||
D.对平面a中的任一向量
|
A.a=(0,0),b=(1,-2) | B.a=(1,-2),b=(2,-4) |
C.a=(3,5),b=(6,10) | D.a=(2,-3),b=(6,9) |
A.
| B.
| ||||||||||||
C.
| D.
|
a |
a |
A.(-1,1) | B.(1,-1) | C.(-1,-1) | D.(1,1) |
OA |
a |
OB |
b |
OP |
p |
p |
| ||
|
|
| ||
|
|
A.∠AOB平分线所在直线上 | B.线段AB中垂线上 |
C.AB边所在直线上 | D.AB边的中线上 |
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