A matrix M is given by M = [[2, 1, -1], [1, 3, 2], [-1, 2, 4]].
(a) Find the determinant of M. [4 marks]
(b) Find the matrix of cofactors of M. [6 marks]
(c) Hence, find the inverse of M, M⁻¹. [4 marks]

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A) null

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B) null

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C) null

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D) null

A matrix M is given by M = [[2, 1, -1], [1, 3, 2], [-1, 2, 4]]. (a) Find the determinant of M. [4 marks] (b) Find the matrix of cofactors of M. [6 marks] (c) Hence, find the inverse of M, M⁻¹. [4 marks]

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