Formula_20179

\[\begin{gathered}T_{0}(x)=1, T_{1}(x)=x, T_{2}(x)=2 x^{2}-1, \\T_{3}(x)=4 x^{3}-3 x, T_{4}(x)=8 x^{4}-8 x^{2}+1, \\T_{5}(x)=16 x^{5}-20 x^{3}+5 x, \ldots .\end{gathered}\]