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设双曲线-=1的右顶点为A,右焦点为F.过点F平行于双曲线的一条渐近线的直线与双...
设双曲线
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=1的右顶点为A,右焦点为F.过点F平行于双曲线的一条渐近线的直线与双曲线交于点B,则△AFB的面积为
.
考点分析:
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=(0,-1,1),
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=(4,1,0),|λ
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|=
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,且λ>0,则λ=
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某几何体中的一条线段长为
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的线段,在该几何体的侧视图与俯视图中,这条棱的投影分别是长为a和b的线段,则a+b的最大值为( )
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B.
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C.(1,2)
D.(1,-2)
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及x轴所围图形的面积为( )
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B.
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C.
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D.2ln2
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