SpecFunc_HyperGeom_2_2

SpecFunc_HyperGeom_2_2(p1, p2, q1, q2, x)

Hypergeometric function of type (2,2).

{}_2F_2(p_1, p_2, q_1, q_2, x) = \sum_{n=0}^{\infty}
                     \left[
                     \prod_{k=0}^{n-1} \frac{(p_1 + k)(p_2 + k)}{(q_1 + k) (q_2 + k)}
                     \right] \frac{x^n}{n!}

Parameters:p1, p2, q1, q2, x : float
Returns:result : float