\[Дано:a < b\ \ и\ \ b > 0.\]
\[² > 0\]
\[b^{3} > 0\]
\[a^{5} < 0\]
\[b^{4} > 0\]
\[a^{2}b > 0\]
\[a^{3}b^{2} < 0\]
\[\left( \text{ab} \right)^{4} > 0\]
\[\left( \text{ab} \right)^{5} < 0\]