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过抛物线y2=2px(p>0)的焦点F的直线l与抛物线在第一象限的交点为A,直线...
过抛物线y
2=2px(p>0)的焦点F的直线l与抛物线在第一象限的交点为A,直线l与抛物线的准线的交点为B,点A在抛物线的准线上的射影为C,若
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,
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,则抛物线的方程为( )
A.y
2=6
B.y
2=3
C.y
2=12
D.
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考点分析:
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B.f(x)的最小正周期为2π,且在(0,π)上为单调递减函数
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=
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