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命题p:若,则与的夹角为钝角.命题q:定义域为R的函数f(x)在(-∞,0)及(...
命题p:若
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,则
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与
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的夹角为钝角.命题q:定义域为R的函数f(x)在(-∞,0)及(0,+∞)上都是增函数,则f(x)在(-∞,+∞)上是增函数.下列说法正确的是( )
A.“p或q”是真命题
B.“p且q”是假命题
C.
¬p为假命题
D.
¬q为假命题
考点分析:
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A.不存在
B.有1个
C.可能不存在也可能有1个
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直线x=0的倾斜角的大小为( )
A.0
B.
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C.π
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2=2px(p>0)的焦点为F,过F的直线交y轴正半轴于点P,交抛物线于A,B两点,其中点A在第一象限.
(Ⅰ)求证:以线段FA为直径的圆与y轴相切;
(Ⅱ)若
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,求λ
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