Question

Am nevoie urgent de a ajutor !!!!!

Answer 1

Răspuns:

Explicație pas cu pas:

$A=\left(\begin{array}{ccc}2&1\\4&2\\\end{array}\right)$

$f(A)=A^{2} -4A$

$A^{2} =A\cdot A=\left(\begin{array}{ccc}2&1\\4&2\\\end{array}\right)\cdot \left(\begin{array}{ccc}2&1\\4&2\\\end{array}\right)=\left(\begin{array}{ccc}8&4\\16&8\\\end{array}\right)$

$f(A)=\left(\begin{array}{ccc}8&4\\16&8\\\end{array}\right)-\left(\begin{array}{ccc}8&4\\16&8\\\end{array}\right)=\left(\begin{array}{ccc}0&0\\0&0\\\end{array}\right)=O_{2}$