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设集合A={4,5,7},B={3,4,7,8}全集U=A∪B,则集合C∪(A∩...
设集合A={4,5,7},B={3,4,7,8}全集U=A∪B,则集合C∪(A∩B),= .
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叫做函数f(x)的“新驻点”,如果函数g(x)=x,h(x)=lnx,φ(x)=cosx(x∈(
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,π))的“新驻点”分别为α,β,γ,那么α,β,γ的大小关系是( )
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如图,已知双曲线
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,A,C分别是虚轴的上、下顶点,B是左顶点,F为左焦点,直线AB与FC相交于点D,则∠BDF的余弦值是( )
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B.
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C.
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D.
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若不等式
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已知M=
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,由如程序框图输出的S=( )
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A.0
B.
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C.1
D.
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