(1-x)α+μ⁢Pn(α+μ,β-μ)⁡(x)Γ⁡(α+μ+n+1)=∫x1(1-y)α⁢Pn(α,β)⁡(y)Γ⁡(α+n+1)⁢(y-x)μ-1Γ⁡(μ)⁢ⅆ⁡y,