題組內容

7. For n≥ 1, let 61e8afe6bf914.jpg = {1, 2,3, ..,n}. 61e8afb5ee4aa.jpg denotes the power set of 61e8afc52e1f8.jpg

(b) Please find 61e8b086da75a.jpgthe number of vertices of the diagram in (a).