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Questions › DSE › DSE 2019 › Q26
0 marksMathematics › Matrices, determinants and linear systems › Matrix identities and Cayley-HamiltonModerateabout 2 min

DSE 2019 Question 26: Matrices, determinants and linear systems

Let A=(1113)A=\begin{pmatrix}1&1\\1&3\end{pmatrix}A=(11​13​). Then A4−4A3+2A2+AA^4-4A^3+2A^2+AA4−4A3+2A2+A equals:

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Let A=[1 1; 1 3]. Then A⁴-4A³+2A²+A equals: (A) I (the 2× 2 identity matrix) (B) I+A (C) A (D) A⁻¹

Also written as: Let A=[1 1; 1 3]. Then A^4-4A^3+2A^2+A equals:

Matrices, determinants and linear systems has come up 102 times in 7 exams since 2006.

What this question tests

This question is on Matrix identities and Cayley-Hamilton, part of Matrices, determinants and linear systems in Mathematics.

Algebraic results about matrix powers, polynomials and special classes.

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Question from the DSE 2019 paper. Solutions are TestStop's own. Not affiliated with or endorsed by any examination authority.