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已知向量,且,则实数x的值为A.-1B.-9C.9D.1
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已知向量
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAKgAAAAWCAYAAABUi9exAAAAAXNSR0IArs4c6QAAAARnQU1BAACx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=
)
,且
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACIAAAAWCAYAAAClrE55AAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAEmSURBVEhL7VbBDcMgDPRceTBO/mzCm0H6ZZA8
GMXFgaBAwCZIkaKqKH00xZfj7uwGkF0bmtXgxm+6+WsbE0SUzeCyfsRttzY0MCEslD8LmhuyyHj0
zBLzPYrMZsRbhdqlaqdRWT/ozmxGOvDzRNqAsjW/QMTp1AjZw757jytSWMik6GEiHq3SeGSaS/Oz
RLxFNWALESyIZE8hnCK0JDAgI10T9zjUx9BUFntNnoiQhHCaBbGYO4xMJGICHWr3JH7vYe5ESIly
IFGRQm5GiUQattBz+kSooJasda9KmkTk2i384YAKrmrUCl3zzhNpdIuQOShtOYJFtngMV3exRGpb
iETOSm/EU1F+FaBgnclMEkm5y68DAy08PUcG/2qHt/2J1FK9RpEvhF2nQNLOcf8AAAAASUVORK5C
YII=
)
,则实数x的值为( )
A.-1
B.-9
C.9
D.1
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C.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAgAAAAjCAYAAACpZEt+AAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAACfSURBVDhP3VNBDsAgCOvL+BPf4TM8hacwmZnD
uc2L2WEmxphgi22BTxYWFpg4gVysx6wUyg6g7KeCWuX884JdpNChbtZTrJVePNg6pzgauzsDdI6w
KFEtMEUoEs+hgoeKTboITSlKUsJUuxcm1KGMvwi6jHD9hfKbWV0/9WmiMBfiku27udhHY5yJhhCd
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D.-
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已知向量
,
,如果
∥
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A.-1
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C.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAjCAYAAACdHYpiAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAACjSURBVEhL7ZXbDYAwCEWZjJ1Yh2UYhVGQ+mqN
qVWa+Ei0afzyyCWnFKzzgc7v7UaAsiGgsW5rPleBkAGA7yhg/KkY/YBP92CUKHkwbZIs0zmRDg7M
CwBCOduScX2XYSsxmhF20KKZidkEtAbO5wBqjB0iKWOHia4zsUQr8NKJTX2FIggtwzQC8ImchQwA
aqrjfEFcFClQwVbl5wH7o3WxB28EDOOfLI4GxsAUAAAAAElFTkSuQmCC
)
D.
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已知向量
=(1,2),
=(0,1),设
=
+
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=2
-
,若
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,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.-
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设x∈R,向量
=(1,x-1),
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D.2或-1
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已知向量
=(3,1),
=(x,-3),且
∥
,则x=( )
A.9
B.-9
C.-![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAgAAAAjCAYAAACpZEt+AAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAACWSURBVDhP3ZPLEcAgCESpjJ5sh2YshVKIiIkG
fxcnhzjDeMgGNo8NyObAQQGTIKAQv3vaiBgEAFLNBKaS8HNBhqQcrEKssE7uYrLW/Yjb2OjWpvsO
hxLVgmopmYcUFCSxpGloPEnm8tDcxLBCrdnsR9Q3M4uZIMuKWWyy34FiQoHH9Iik8+E6sBD6r3j+
qj5Nny5rsfMLN2zqeSiCl84AAAAASUVORK5CYII=
)
D.