\[\mathsf{Q}^{\mu}_{\nu}\left(x\right)\sim(-1)^{\mu+(1/2)}\frac{\pi\Gamma\left(%
\nu+\mu+1\right)}{2\Gamma\left(\mu+1\right)\Gamma\left(\nu-\mu+1\right)}\left(%
\frac{1-x}{2}\right)^{\mu/2},\]