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Apply Cayley-Hamilton theorem for $A = \begin{bmatrix} \ 1 & 2 \\ \ 2 & -1 \\ \end{bmatrix}$ and deduce that $A^8=625I$
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written 2.3 years ago by | • modified 2.3 years ago |
Given,
$A = \begin{bmatrix} \ 1 & 2 \\ \ 2 & -1 \\ \end{bmatrix}$
To Prove :- $A^8 = 625I$
Proof :-
$A = \begin{bmatrix} \ 1 & 2 \\ \ 2 & -1 \\ \end{bmatrix}$
The characteristic equation of A will be |A - λI| = 0
$\implies …