设<img src="http://jgxm-question.oss-cn-beijing.aliyuncs.com/psst/files/c118bcfaac2a4a54915333208c60c6a6.png?x-oss-process=image/sharpen,200"/>是<img src="http://jgxm-question.oss-cn-beijing.aliyuncs.com/psst/files/4548602d01444224b31c69133d6dcf79.png?x-oss-process=image/sharpen,200"/>的一个原函数，则<img src="http://jgxm-question.oss-cn-beijing.aliyuncs.com/psst/files/254c0ec8212147cbb70a460d5bd0e861.png?x-oss-process=image/sharpen,200"/>（）.