9. \( k^{4}-3=0 \) olarsa, \( k^{16}+2 \) ifadəsinin qiymatini tapin. \( \begin{array}{llll}\text { A) } 66 & \text { B) } 50 & \text { C) } 18 & \text { D) } 29 \\ \text { E) } 83\end{array} \)

Résoudre dans \( \mathbb{C}: \mathrm{z}^{7}=1 \)

Rewrite the following without an exponent \[ (-7)^{-2} \]

\begin{tabular}{l|l}\( \begin{array}{l}\text { Simplify the expression so that no negative exponents } \\ \text { appear in the final result. Assume all variables represent } \\ \text { nonzero real numbers. }\end{array} \) & \( \begin{array}{l}\left(4 a^{-2}\right)^{4}\left(a^{4}\right)^{-3}=\square \\ \\ \left(4 a^{-2}\right)^{4}\left(a^{4}\right)^{-3}\end{array} \) \\ exponents only.) \end{tabular}

\( 1 \leftarrow \quad \) Determine whether \( B \) is the inverse of \( A \). \( A=\left[\begin{array}{rr}3 & -7 \\ -2 & 5\end{array}\right], \quad B=\left[\begin{array}{ll}5 & 7 \\ 2 & 3\end{array}\right] \)

\( 1 \leftarrow \) Show that \( A I=I A=A \). \( A=\left[\begin{array}{rr}1 & 8 \\ -2 & 2\end{array}\right] \)