\(\normalsize Confluent\ hypergeometric\ differential\ equation\\ (1)\ zy''+(b-z)y'-ay=0\\ \hspace{25px} y=c_1M(a,b,z)+c_2U(a,b,z)\\ (2)\ M(a,b,z)={}_1F_1(a;b;z)\\ \hspace{85px}=1+{\large\frac{a}{b}}z+{\large\frac{a(a+1)}{b(b+1)}\frac{z^2}{2!}}+\cdots={\large \displaystyle \sum_{\small n=0}^{\small \infty}}{\large \frac{(a)_n}{(b)_n}\frac{z^n}{n!}}\\ \) |
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