设函数<img src="http://jgxm-question.oss-cn-beijing.aliyuncs.com/psst/files/80371b7d49074d7e909ee7fb6c0505f0.png?x-oss-process=image/sharpen,200"/>在<img src="http://jgxm-question.oss-cn-beijing.aliyuncs.com/psst/files/614482dcd9284d5c9a7838379f0c0608.png?x-oss-process=image/sharpen,200"/>内连续，且<img src="http://jgxm-question.oss-cn-beijing.aliyuncs.com/psst/files/efca7e983de64d799bd71ece6d3fa5e0.png?x-oss-process=image/sharpen,200"/>，则常数<img src="http://jgxm-question.oss-cn-beijing.aliyuncs.com/psst/files/2c495ef83d3c42b097521af8457f7669.png?x-oss-process=image/sharpen,200"/>满足( ).