# 3.5.2.5.18 Bessel_k1_scaled

## Definition:

$k1\_scaled = bessel\_k1\_scaled(x)$ evaluates an approximation to $e^xK_1\left( x\right)$, where $k_1$is a modified Bessel function of the second kind. The scaling factor ex removes most of the variation in $k_1$.

$k1\_scaled$ (output, double)
Approximation of $e^xK_1\left( x\right)$