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直线y=kx与曲线y=e|lnx|-|x-2|有3个公共点时,实数k的取值范围是...
直线y=kx与曲线y=e|lnx|-|x-2|有3个公共点时,实数k的取值范围是 .
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的前n项和Sn=
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在△ABC中,a、b、c分别为∠A、∠B、∠C的对边,三边a、b、c成等差数列,且
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B.
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D.
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点P到点
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及到直线
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的距离都相等,如果这样的点恰好只有一个,那么a的值是( )
A.
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C.2
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