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函数f(x)=|x-2|-lnx在定义域内零点的个数为( ) A.0 B.1 C...
函数f(x)=|x-2|-lnx在定义域内零点的个数为( )
A.0
B.1
C.2
D.3
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=( )
A.1
B.
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C.2
D.4
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已知集合A={1,2,m},B={3,4},A∪B={1,2,3,4}则m=( )
A.0
B.3
C.4
D.3或4
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设i为虚数单位,则复数
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等于( )
A.
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D.
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已知函数f(x)=alnx-ax-3(a∈R).
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.
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.
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n•b
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n<b
n恒成立.
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