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Exercise 4

Avg difficulty 3.0

Use the determinant to decide if each is singular or nonsingular.

  • (a)  (2131)\begin{pmatrix}2&1\\ 3&1\end{pmatrix}     (b)  (011−1)\begin{pmatrix}0&1\\ 1&-1\end{pmatrix}     (c)  (4221)\begin{pmatrix}4&2\\ 2&1\end{pmatrix}

Hefferon, Linear Algebra, Determinants, Exploration, Exercise 4

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Adapted from Linear Algebra © 2016 Jim Hefferon. Licensed under CC BY-SA 3.0 US. Source: Linear Algebra. Imported at revision df2262e.