设函数<img src="http://jgxm-question.oss-cn-beijing.aliyuncs.com/psst/files/4548602d01444224b31c69133d6dcf79.png?x-oss-process=image/sharpen,200"/>在<img src="http://jgxm-question.oss-cn-beijing.aliyuncs.com/psst/files/3af5e42c36b64ec0b77f12c6f0429852.png?x-oss-process=image/sharpen,200"/>内连续，且满足<img src="http://jgxm-question.oss-cn-beijing.aliyuncs.com/psst/files/bc17dacdc86a4811882439c592ce5975.png?x-oss-process=image/sharpen,200"/>，则（）．