﻿功能:一种退化后的第二类椭圆积分

格式:EllipticRD(x,y,z)

说明:
函数定义函数如下
$$
\begin{aligned}
\mathbf{EllipticRD}(x, y, z) &= \dfrac{3}{2}\int_0^\infty \dfrac{1}{\sqrt{t+x}\sqrt{t+y}\sqrt{t+z}(t+z)}dt
\\
\\
\mathbf{s}\cdot\mathbf{t}\cdot&:x\geq 0,y\geq 0,z\geq 0
\end{aligned}
$$

参考:《NUMERICAL COMPUTATION OF REAL OR COMPLEX ELLIPTIC INTEGRALS》_B.C.CarlsonAmes_Laboratory and Department of Mathematics, Iowa State University,Ames, Iowa 50011-3020, USA

例子:

EllipticRD(i,i,i)//回车得到如下结果
ans = -0.707106781186547 - 0.707106781186547i