BesselKDerivative

BesselKDerivative(nu, x)

Derivative of the modified second kind Bessel function of order \nu.

\forall x \in \Rset, \quad
\mathrm{K'}_{\nu}(x) = \frac{\mathrm{K}_{\nu-1}(x) + \mathrm{K}_{\nu+1}(x)}{-2}

Parameters:
nufloat
xfloat
Returns:
resultfloat