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已知空间三点的坐标为A(1,5,-2),B(2,4,1),C(p,3,q+2),...
已知空间三点的坐标为A(1,5,-2),B(2,4,1),C(p,3,q+2),若A,B,C三点共线,则p= ,q= .
考点分析:
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已知椭圆
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,则m的值为:
.
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下列说法中错误的个数为①一个命题的逆命题为真,它的否命题也一定为真;②若一个命题的否命题为假,则它本身一定为真;③
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是
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的充要条件;④
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与a=b是等价的;⑤“x≠3”是“|x|≠3”成立的充分条件.( )
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B.3
C.4
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过抛物线y
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B.3
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已知方程
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F
1,F
2是椭圆
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1F
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1F
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B.
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C.
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D.
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