已知命题：[0,l],，命题若命题“”是真命题，则实数的取值范围是 �

已知命题：[0,l],，命题若命题“”是真命题，则实数的取值范围是 .

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已知命题：[0,l],，命题若命题“”是真命题，则实数的取值范围是 �

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