若向量
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满足条件
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=30,则x=
.
考点分析:
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已知在三角形ABC中,AB=2,AC=3,∠BAC=θ,若D为BC的三等分点〔靠近点B一侧).则
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的取值范围为
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设命题p:“若对任意x∈R,|x+1|+|x-2|>a,则a<3”;命题q:“设M为平面内任意一点,则A、B、C三点共线的充要条件是存在角α,使
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B.p∨q为假命题
C.¬p∧q为假命题
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已知向量
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=(2,1),则
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的充要条件是( )
A.x=-
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在复平面内,O是原点,向量
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124419385199289/SYS201310251244193851992002_ST/0.png)
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