已知函数，若数列满足，且是递减数列，则实数的取值范围是(

已知函数，若数列满足，且是递减数列，则实数的取值范围是( )

（A）（B）（C）（D）

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已知函数，若数列满足，且是递减数列，则实数的取值范围是(

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