題組內容

5. (15%) Give the vectors \( v{1} = (2, 1, 3) \), \( v{2} = (5, 3, 1) \) and \( v_{3} = (1, 7, 2) \).

(d) Give an invertible \( n \) by \( n \) matrix \( \mathbf{A} \). Show that \( \mathbf{A}\mathbf{v}1, \mathbf{A}\mathbf{v}2, \) and \( \mathbf{A}\mathbf{v}_3 \) is also a basis for \( \mathbf{S} \).