Formula_21282

\[\begin{gathered}\left(1-x^{2}\right)^{1 / 4} \sqrt{h(x)}\left|f .(x)-\sum_{k=0}^{n} a_{k} \hat{P}_{k}(x ; \alpha, \beta)\right| \leqslant c_{3} E_{n}(f) \ln n, \\x \in[-1,1]\end{gathered}\]