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Back to Laplace’s Expansion

Exercise 6

Avg difficulty 3.0

Find the matrix adjoint to each.

  • (a)  (214−102101)\begin{pmatrix}2&1&4\\ -1&0&2\\ 1&0&1\end{pmatrix}     (b)  (3−124)\begin{pmatrix}3&-1\\ 2&4\end{pmatrix}     (c)  (1150)\begin{pmatrix}1&1\\ 5&0\end{pmatrix}     (d)  (143−103189)\begin{pmatrix}1&4&3\\ -1&0&3\\ 1&8&9\end{pmatrix}

Hefferon, Linear Algebra, Determinants, Laplace’s Expansion, Exercise 6

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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.