Đáp án:
$a)27;b) - 27;c)125;d)1;e)81$
Giải thích các bước giải:
$\begin{array}{l}
a)\dfrac{{{{72}^3}}}{{{{24}^3}}} = {\left( {\dfrac{{72}}{{24}}} \right)^3} = {3^3} = 27\\
b)\dfrac{{{{\left( { - 10,5} \right)}^3}}}{{{{\left( {3,5} \right)}^3}}} = {\left( {\dfrac{{ - 10,5}}{{3,5}}} \right)^3} = {\left( { - 3} \right)^3} = - 27\\
c)\dfrac{{{{15}^3}}}{{27}} = \dfrac{{{{15}^3}}}{{{3^3}}} = {\left( {\dfrac{{15}}{3}} \right)^3} = {5^3} = 125\\
d)0,{125^3}{.8^3} = {\left( {0,125.8} \right)^3} = {1^3} = 1\\
e){\left( { - 39} \right)^4}:{13^4} = {\left( {\dfrac{{ - 39}}{{13}}} \right)^4} = {\left( { - 3} \right)^4} = 81
\end{array}$
