已知幂级数<img src="http://jgxm-question.oss-cn-beijing.aliyuncs.com/psst/files/b4eebeaa7dca4bdaa3ac198ae6763539.png?x-oss-process=image/sharpen,200"/>在<img src="http://jgxm-question.oss-cn-beijing.aliyuncs.com/psst/files/72435c4282d24f3bbcb7f83155b99829.png?x-oss-process=image/sharpen,200"/>处收敛，则（）.‏