问题
根据方阵的幂运算规律，$\left(\boldsymbol{A}^{k}\right)^{l}$ $=$ $?$选项
[A]. $\left(\boldsymbol{A}^{k}\right)^{l}$ $=$ $\boldsymbol{A}^{k + l}$[B]. $\left(\boldsymbol{A}^{k}\right)^{l}$ $=$ $\boldsymbol{A}^{k l}$
[C]. $\left(\boldsymbol{A}^{k}\right)^{l}$ $=$ $\boldsymbol{A}^{k – l}$
[D]. $\left(\boldsymbol{A}^{k}\right)^{l}$ $=$ $\boldsymbol{A}^{\frac{k}{l}}$
$\left(\boldsymbol{A}^{\textcolor{orange}{k}}\right)^{\textcolor{cyan}{l}}$ $=$ $\boldsymbol{A}^{\textcolor{orange}{k} \textcolor{cyan}{l}}$