[理工] [線代]-綜合題
A為2階方陣，且相異特徵值所以對應的特徵向量正交，一個線性運算T(U):R^2 TO R^2
定義T(U)=AU 請問T(U)為?
(A)a reflection ofｕ with respect to a line
(B)a projection of u on line
(C)a rotation of u by a contant angle
(D)a scaling of u by a constant
該如何下手阿 我完全不知道他在考什麼＃＃
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