Trong không gian R2, cho tích vô hướng (x, y)=((x1;x2),(y1;y2))=x1y1−x1y2−x2y1 +3x2y2. Tính độ dài của véctơ v=(−1;3)

Atravel agent is booking a trip to england, scotland, ireland, and france for a group of senior citizens. the agent sent surveys to the group, asking which countries they would like to visit, in order, and created the shown preference schedule (e = england, i = ireland, s = scotland, f = france). which country is the condorcet winner? number of votes 15 12 16 19 1st f e e i 2nd e s i s 3rd s i s e 4th i f f f 1. scotland 2. england 3. france 4.ireland