当我厌倦了打发时间时,我会计算公式。
(呃,我的问题类型可能不是很线性)
我最喜欢的公式:
- $\显示样式z_{(\alpha)}=\alpha^{\frac{z}{\alpha}}\Gamma\left(1+\frac{z}}{\alpha}\right)\prod_{j=1}^{\alfa-1}\left \alpha}(z)=\frac{1}{\alpha{\sum_{k=1}^{\alfa}\cos\left$
- $\displaystyle\Gamma(z)=\frac{(-1)^m}{m!(z+m)}\sum_{n=0}^{\infty}\frac{B_n(a_1,…,a_n)}{n!}(z+m)^{n}\qquad\text{where}\开始{案例}an=(n-1)!\左(H_m^{(n)}+(-1)^n\zeta(n)\right)\\zeta(1)\overset{\mathcal{R}}{=}\gamma\end{cases}$
- $\显示样式\sum_{n=1}^{x} n个^{s-1}\ln(n)^m\propto(-1)^m\左[\zeta^{(m)}(1-s)+\sum_{k=0}^m}\frac{m!}{k!}\sum_{j=0}^{s}\binom{s}{j}\frac{B_{s-j}^{+}x^j}{s^{m+1-k}B_k\左H_s^{(l+1)}\right)-\delta_l\ln(x)\right\}_{l=0}^{k-1}\right]$
- $\displaystyle\sum_{n=0}^{\infty}n_{(\alpha)}\overset{\mathcal{R}}{=}\frac{1}{\alpha\sqrt[\alpha]{e}}\text{Ei}\left(\frac}{\alpha}\right)+\sum_{k=1}^{\alfa-1}\left[\frac[\cos\left(\frac{k\pi}{\阿尔pha}\reight c{k}{\alpha}\right)+\frac{1}{k}}_1F_1\left(\left.{1\top 1+\frac{k}{\alfa}}\right|-\frac}1\right)-1\right]$
- $\显示样式z_{(\fty)}=\exp\left(\sum_{k=1}^{\fty}\ln(k)\cdot\text{sinc}(z-k)\right)$
- $\displaystyle\int\operatorname{tan^{-1}}(\alpha\cdot\cos(x))x^n\mathrm{d} x个=2n!\求和{k=0}^{n}\frac{x^{n-k}}{(n-k)!}\Im\left[i^k\cdot\text{钛}_{k+2}\左(\frac{\sqrt{\alpha^2+1}-1}{\alfa}\cdot e^{ix}\右)\右]$
- $\显示样式\int_0^x\frac{t^{m-1}}{(1\pmt^n)^p}\mathrm{d} t吨=\frac{x^{m}}{n}\sum_{j=1}^{p-1}\frac{displaystyle\left[\prod_{k=j+1}^{p1}\frac{nk-m}{nk}\right]}{j\ left(1\pmx^{n}\right)^{j}}+(I(x)-j(x)$
$\显示样式I(x)=\frac{1}{n}\sum_{k=1}^{n}\Re\left[e^{m\theta}\ln(1-xe^{-I\theta{)\right]\quad\begin{cases}\text{When}+:&J(x)=\显示样式\sum_{k=1}^{left\lfloor{m-1}{n}}}\right\rfloor}(-1)^{k}\frac}x^{m-nk}}{m-nk{qquad\theta=\frac{2k-1}{n}\pi\\\文本{When}-:&\显示样式J(x)=\sum_{k=1}^{left\lfloor{\frac{m-1}{n}}\right\rfloor}\frac{x^{m-nk}}{m-nk{quad\qquad\ theta=\frac{2k}{n{\pi\结束{cases}$