cara menghitung nilai determinan (1 + A)^3.. di soal di bawah ini.. gimana ya caranya? makasih..

Penyelesaian:

[tex] A = \left[\begin{array}{ccc}1&2\\0&1\end{array}\right] [/tex]
[tex]I = \left[\begin{array}{ccc}1&0\\0&1\end{array}\right] [/tex]

1/(I + A)³ ...?

I + A = [tex] \left[\begin{array}{ccc}2&2\\0&2\end{array}\right] [/tex]
deteminan = 4

(I + A)³ = 4³ 
= (2²)³
= 2^6  (D).