A、<img width="41" height="47" src="http://admintk.100xuexi.com/UpLoadImage/2016-10-26/8419f059-2ab3-4ff9-b42b-0ae9905a3a04.png" />
B、<img width="71" height="48" src="http://admintk.100xuexi.com/UpLoadImage/2016-10-26/36cb7634-653c-49bb-95da-6e22d46fdc04.png" />
C、<img width="72" height="47" src="http://admintk.100xuexi.com/UpLoadImage/2016-10-26/aa7376fc-bc4c-4a64-abbe-9e31bf2bda07.png" />
D、<img width="87" height="47" src="http://admintk.100xuexi.com/UpLoadImage/2016-10-26/ee63d222-bd63-4c99-b15e-30ef70630d89.png" />
查看答案
展开成（x－1）的幂级数是（ ）。