\(\root 3 \of { - 343} = \root 3 \of {{{\left( { - 7} \right)}^3}} = - 7\)
\(\root 3 \of {0,027} = \root 3 \of {{{\left( {0,3} \right)}^3}} = 0,3\)
\(\root 3 \of {1,331} = \root 3 \of {{{\left( {1,1} \right)}^3}} = 1,1\)
\(\root 3 \of { - 0,512} = \root 3 \of {{{\left( { - 0,8} \right)}^3}} = - 0,8\)
