申論題

Problem 3 (25%) 本問題共有(a)~(d)四個子題,除了(b)子題裡的 discus 之外,每個題都只要寫出提問的答案即 可(不須寫出答案背後的推導)。

(b) Now denote the set
 S := in terms ofsolution of (a). Write out the set S and discuss if the closure property of vector addition holds for set S, i.e. whether the implication "" holds for any P₁ and P₂. (1+5%)