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已知函数F(x)=|lgx|,若0<a<b,且f(a)=f(b),则a+2b的取...
已知函数F(x)=|lgx|,若0<a<b,且f(a)=f(b),则a+2b的取值范围是( )
A.
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B.
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C.(3,+∞)
D.[3,+∞)
考点分析:
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