Question

me ajudemmmmmm por favor. :(((​

Answer 1

Resposta:

Explicação passo-a-passo:

$\left(\begin{array}{ccc}1&2\\1&3\end{array}\right) X \left(\begin{array}{ccc}a&b\\c&d\end{array}\right) =\left(\begin{array}{ccc}1&0\\0&1\end{array}\right)$

a + 2c = 1

a + 3c = 0 => a = - 3c

a + 2c = 1

- 3c + 2c = 1

- c = 1

c = -1

a = 3

b + 2d = 0=> b = - 2 d

b + 3d = 1

- 2d + 3d = 1

d = 1

b = - 2

$A^{-1} = \left(\begin{array}{ccc}3&-2\\-1&1\end{array}\right)$