若函数<img src="http://jgxm-question.oss-cn-beijing.aliyuncs.com/psst/files/03f3c8b5183e458b8dcb4fda1f2da049.png?x-oss-process=image/sharpen,200"/>的导函数是<img src="http://jgxm-question.oss-cn-beijing.aliyuncs.com/psst/files/171cdbe8cccb4d62839935040f120bc5.png?x-oss-process=image/sharpen,200"/>则<img src="http://jgxm-question.oss-cn-beijing.aliyuncs.com/psst/files/3bd23434148540b2abff8102b10a3dbc.png?x-oss-process=image/sharpen,200"/>的一个原函数为（）