grandes-ecoles 2020 Q35

grandes-ecoles · France · centrale-maths1__pc Matrices Matrix Power Computation and Application
Let $$B = \frac{1}{4} \left(\begin{array}{cccc} 0 & -5 & 0 & -3 \\ 5 & 0 & 3 & 0 \\ 0 & -3 & 0 & -5 \\ 3 & 0 & 5 & 0 \end{array}\right).$$ Compute $B^{2} \left(\begin{array}{l} 1 \\ 1 \\ 1 \\ 1 \end{array}\right)$.
Let
$$B = \frac{1}{4} \left(\begin{array}{cccc} 0 & -5 & 0 & -3 \\ 5 & 0 & 3 & 0 \\ 0 & -3 & 0 & -5 \\ 3 & 0 & 5 & 0 \end{array}\right).$$
Compute $B^{2} \left(\begin{array}{l} 1 \\ 1 \\ 1 \\ 1 \end{array}\right)$.