设<imgwidth="52"height="21"v:shapes="对象_x0020_4"src="http://wljy.whut.edu.cn:80/uploadfiles/word/lssxpdt.files/image002.png">,则<imgwidth="20"height="20"v:shapes="对象_x0020_5"src="http://wljy.whut.edu.cn:80/uploadfiles/word/lssxpdt.files/image004.png">的幂集是<imgwidth="166"height="22"v:shapes="对象_x0020_6"src="http://wljy.whut.edu.cn:80/uploadfiles/word/lssxpdt.files/image006.png">。