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Exercise 10.4.3

Avg difficulty 3.0

Suppose T:R3→R3T:\mathbb{R}^{3}\to\mathbb{R}^{3} is a linear transformation such that

T[100]=[333],T[010]=[123],T[001]=[13−1].T\left[\begin{array}{r}1\\ 0\\ 0\end{array}\right]=\left[\begin{array}{r}3\\ 3\\ 3\end{array}\right],\quad T\left[\begin{array}{r}0\\ 1\\ 0\end{array}\right]=\left[\begin{array}{r}1\\ 2\\ 3\end{array}\right],\quad T\left[\begin{array}{r}0\\ 0\\ 1\end{array}\right]=\left[\begin{array}{r}1\\ 3\\ -1\end{array}\right].

Let E={e1,e2,e3}E=\left\{\mathbf{e}_{1},\mathbf{e}_{2},\mathbf{e}_{3}\right\} be the standard basis of R3\mathbb{R}^{3}, and let

B={v1,v2,v3}={[100], [110], [211]}B=\left\{\mathbf{v}_{1},\mathbf{v}_{2},\mathbf{v}_{3}\right\}=\left\{\left[\begin{array}{r}1\\ 0\\ 0\end{array}\right],~{}\left[\begin{array}{r}1\\ 1\\ 0\end{array}\right],~{}\left[\begin{array}{r}2\\ 1\\ 1\end{array}\right]\right\}

be another basis.

  1. Find the matrix of TT with respect to EE, i.e., find [T]E,E\left[T\right]_{E,E}.

  2. Find [T]B,B\left[T\right]_{B,B}.

Selinger, Matrix Theory and Linear Algebra, Linear transformation of vector spaces, The matrix of a linear transformation, Exercise 10.4.3

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Adapted from Matrix Theory and Linear Algebra © 2017–2026 Peter Selinger, Lyryx Learning, and Ken Kuttler. Licensed under CC BY 4.0. Source: Matrix Theory and Linear Algebra. Imported at revision d74bc3a.