O'Quinn Griffin
07/26/2023 · Senior High School
Problema: Sea \( T: \mathbb{R}^{3} \rightarrow \mathbb{R}^{2} \) una transformación lineal definida por: \[ T(x, y, z)=(x+2 y-z, 3 x+y) \] a) Encuentre una base para el núcleo de \( T, N(T) \). b) Encuentre una base para la imagen de \( T, \operatorname{Im}(T) \). c) ¿Es \( T \) inyectiva? ¿Es sobreyectiva? Justifica tu respuesta.
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a) Una base para el núcleo de \( T \) es \( N(T) = \text{span}\{(1, -3, -5)\} \).
b) Una base para la imagen de \( T \) es \( \operatorname{Im}(T) = \text{span}\left\{ \begin{pmatrix} 1 \\ 3 \end{pmatrix}, \begin{pmatrix} 2 \\ 1 \end{pmatrix} \right\} \).
c) \( T \) no es inyectiva y no es sobreyectiva.
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