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已知向量,,如果∥,那么实数k的值为A.-1B.1C.D.
试题详情
已知向量
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAFAAAAAWCAYAAABXEBvcAAAAAXNSR0IArs4c6QAAAARnQU1BAACx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==
)
,
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAFAAAAAWCAYAAABXEBvcAAAAAXNSR0IArs4c6QAAAARnQU1BAACx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)
,如果
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAwAAAAWCAYAAAD0OH0aAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAACkSURBVDhP3VO5EQMhDFRdF6icy9UJsQpxSiEE
KmUt2RiOM3OMZxx4LCARu6sHQbi0grQnlAOGrgl+WxK2/dZg5Ib12ZBqmM8jfL+Gk+I6pX8nZHk9
oiBnAUl+63rtkkGZwGoVkCE+ARM8HoRQ7uDwhACj8YfhMwWzOuRgM1+9JlOeqJ8jdjEa03nmThTp
GHxPio7wbcS9O746aUZY/qAR8IPDdwc+xLsdewqvaAAAAABJRU5ErkJggg==
)
∥
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAwAAAAWCAYAAAD0OH0aAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAACySURBVDhPrVO7EYUgEKQuA8oxv06Ir5CXUggB
pezjHsigHKBvZMbAYff2c2owPQFudwgNxswJ6TY4bPunwkw6WD8bXJF5rvB+hsvEtaURwVMJT37q
8qQQ2WKBR0OIYEuYz0dDiAy7Gp/MVoVsx4OORVpGVNIUgtiR0Iel/K4JZoJiR1obEvp2RMGCFU9J
QWnHE8ygANPZEXDN0qf+ZahbloaebHr5M7V7uAMWzP9f612FL960uYg38Ff7AAAAAElFTkSuQmCC
)
,那么实数k的值为( )
A.-1
B.1
C.
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAjCAYAAACdHYpiAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAACjSURBVEhL7ZXbDYAwCEWZjJ1Yh2UYhVGQ+mqN
qVWa+Ei0afzyyCWnFKzzgc7v7UaAsiGgsW5rPleBkAGA7yhg/KkY/YBP92CUKHkwbZIs0zmRDg7M
CwBCOduScX2XYSsxmhF20KKZidkEtAbO5wBqjB0iKWOHia4zsUQr8NKJTX2FIggtwzQC8ImchQwA
aqrjfEFcFClQwVbl5wH7o3WxB28EDOOfLI4GxsAUAAAAAElFTkSuQmCC
)
D.
相关试题
-
已知向量
=(1,2),
=(0,1),设
=
+
,
=2
-
,若
∥
,则实数k的值为( )
A.-1
B.1
C.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAgAAAAjCAYAAACpZEt+AAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAACfSURBVDhP3VNBDsAgCOvL+BPf4TM8hacwmZnD
uc2L2WEmxphgi22BTxYWFpg4gVysx6wUyg6g7KeCWuX884JdpNChbtZTrJVePNg6pzgauzsDdI6w
KFEtMEUoEs+hgoeKTboITSlKUsJUuxcm1KGMvwi6jHD9hfKbWV0/9WmiMBfiku27udhHY5yJhhCd
55DEIB13RFOjUSfVZ2a9eL4BYBXpBOX9qe0AAAAASUVORK5CYII=
)
D.-
-
已知向量
,
,如果
∥
,那么实数k的值为( )
A.-1
B.1
C.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAjCAYAAACdHYpiAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAACjSURBVEhL7ZXbDYAwCEWZjJ1Yh2UYhVGQ+mqN
qVWa+Ei0afzyyCWnFKzzgc7v7UaAsiGgsW5rPleBkAGA7yhg/KkY/YBP92CUKHkwbZIs0zmRDg7M
CwBCOduScX2XYSsxmhF20KKZidkEtAbO5wBqjB0iKWOHia4zsUQr8NKJTX2FIggtwzQC8ImchQwA
aqrjfEFcFClQwVbl5wH7o3WxB28EDOOfLI4GxsAUAAAAAElFTkSuQmCC
)
D.
-
已知向量
=(1,2),
=(0,1),设
=
+
,
=2
-
,若
∥
,则实数k的值为( )
A.-1
B.1
C.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAgAAAAjCAYAAACpZEt+AAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAACfSURBVDhP3VNBDsAgCOvL+BPf4TM8hacwmZnD
uc2L2WEmxphgi22BTxYWFpg4gVysx6wUyg6g7KeCWuX884JdpNChbtZTrJVePNg6pzgauzsDdI6w
KFEtMEUoEs+hgoeKTboITSlKUsJUuxcm1KGMvwi6jHD9hfKbWV0/9WmiMBfiku27udhHY5yJhhCd
55DEIB13RFOjUSfVZ2a9eL4BYBXpBOX9qe0AAAAASUVORK5CYII=
)
D.-
-
已知向量
,且
,则实数x的值为( )
A.-1
B.-9
C.9
D.1
-
设x∈R,向量
=(1,x-1),
=(-2,x),若
,则实数x等于( )
A.-2或1
B.-2或-1
C.2或1
D.2或-1
-
已知向量
和向量
的夹角为30°,|
|=2,|
|=
,则向量
和向量
的数量积
•
=( )
A.1
B.2
C.3
D.4
-
已知
,则向量
在向量
的方向上的投影是( )
A.1
B.-1
C.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAgAAAAjCAYAAACpZEt+AAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAACfSURBVDhP3VNBDsAgCOvL+BPf4TM8hacwmZnD
uc2L2WEmxphgi22BTxYWFpg4gVysx6wUyg6g7KeCWuX884JdpNChbtZTrJVePNg6pzgauzsDdI6w
KFEtMEUoEs+hgoeKTboITSlKUsJUuxcm1KGMvwi6jHD9hfKbWV0/9WmiMBfiku27udhHY5yJhhCd
55DEIB13RFOjUSfVZ2a9eL4BYBXpBOX9qe0AAAAASUVORK5CYII=
)
D.
-
已知向量
,若向量
与
垂直,则k的值为( )
A.-1
B.1
C.-2
D.2
-
已知
,
是平面内两个互相垂直的单位向量,若向量
满足
,则
的最大值是( )
A.1
B.2
C.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAA8AAAASCAYAAACEnoQPAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAC/SURBVDhPzZNBEsUQEETnXBaOY+8m1g5iOwfJ
wlH6ZwRJ8ItklVSpQmn9picIg4+IsDT+iUf77R59XMz2zEB7xIw7x44e2nI+zrASZl5PxZG5OskN
0WtQdp+Ku0ClhFXnVsyWUKp45nyrH3ggjvDaokQnRIRgchtMJZRfs8fV8KVHpVUhhDR1iqDcluat
WBKu3ZIDe2iyPi0SweF+FUtA/SM58G98ZscV9xH28A1cNzenQMq9E8tF4v7KuVCsin81ApctPDAe
KwAAAABJRU5ErkJggg==
)
D.
-
已知向量
=
,向量
,求函数f(x)=
在区间
上的最大值是( )
A.1
B.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAB8AAAAkCAYAAABxE+FXAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAFoSURBVFhH7ZbBDcMgDEU9Vw6Mkzub5MwguTJI
D4ziYkgpkBAZsFpVKlKlSAUe/xtjAwoPAEDOj7AgzA5g7uDPZO74g3BnUIFC45gSG9NOyq1+3wFt
i1XR9jRBGm5RJ6D/9vch52cxpz9v4P6A1cEvtRfKncPcSKs/Cc+O54xCuLQ9ei+vPOzr0Kgj93vg
ZFPzwWjEoJlq4UIDquxGz8V8X4/DrcnguzyvrZ+C7/seoNsCuGyP8H37yFBWZY5NwZPc4EBU34ZT
7MtsivAjHq/4clKqzrPVx5PU5/Bgcyo05zQWe9sf24KwbN8rLKT+BwvLXD0ZWu1d4nUe0vNCZgwd
WWjRH95nZN6dKFPU7J6N+m2n17DqTuo6zT1AN9xZWygNT+ig+m74SVVVqbiqRVKt7ss+By/i34ON
cydsp/qsfec3PobhVgv0+CPnphteNBzMnr5mdSu/7mjH7O+GjzjVWvOHS7rJ3usJ9QrwdabV9e8A
AAAASUVORK5CYII=
)
C.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAgAAAAjCAYAAACpZEt+AAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAC7SURBVDhPvZPZEYAwCESpjJ5oJ81QCqUgmBgh
ifqhY2Ycj3Cs7Avow4KPAqQoAij4RZyKWgtWwqKyf7ZnC4oxoCJtsyYyjQGxINOqxZl5oSGUaGKx
VEW+pjlIQYUuehFgKpOOoYJowfEvPOMY0jCDpYbRm6/MuvHc9DUXF/dfRcZhBR+qBnewI1SJitiB
MCei3rr5xGTSMxHlLJCBn1d3kwk1oJiZdOXpQNlcjnfwgzIbdrb6A5gbmPatDZps4PCLzCp3AAAA
AElFTkSuQmCC
)
D.1+