1. 安装过程

1. 安装hexo-filter-mathjax插件

如果渲染器为 hexo-renderer-pug， 则==不需要安装==。

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npm i --save hexo-filter-mathjax

2. 在页首设置mathjax: true，如：

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---
title: Markdown语法测试页面
date: 2023-02-01 15:43:00
tags: Markdown
categories: 
mathjax: true
---

2. 公式示例

1. 行内公式

使用$ 包裹 Mathjax格式的数学公式，如$E=mc^2$：$E=mc^2$， $O(\lvert X \rvert N^2)$： $O(\lvert X \rvert N^2)$，$\epsilon-$：$\epsilon-$ 。

2. 块公式

使用$$ 包裹公式 ，==换行符需要4个\\\\==

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$$\sum_{i=1}^n a_i=0$$

$$\sum_{i=1}^n a_i=0$$

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$$ x = {-b \pm \sqrt{b^2-4ac} \over 2a} $$

$$ x = {-b \pm \sqrt{b^2-4ac} \over 2a} $$

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$$H(D_2) = -\left(\frac{2}{4}\log_2 \frac{2}{4} + \frac{2}{4}\log_2 \frac{2}{4}\right) = 1$$

$$H(D_2) = -\left(\frac{2}{4}\log_2 \frac{2}{4} + \frac{2}{4}\log_2 \frac{2}{4}\right) = 1$$

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$$\begin{pmatrix}
  1 & a_1 & a_1^2 & \cdots & a_1^n \\\\
  1 & a_2 & a_2^2 & \cdots & a_2^n \\\\
  \vdots & \vdots & \vdots & \ddots & \vdots \\\\
  1 & a_m & a_m^2 & \cdots & a_m^n \\\\
  \end{pmatrix}$$

$$\begin{pmatrix} 1 & a_1 & a_1^2 & \cdots & a_1^n \\ 1 & a_2 & a_2^2 & \cdots & a_2^n \\ \vdots & \vdots & \vdots & \ddots & \vdots \\ 1 & a_m & a_m^2 & \cdots & a_m^n \\ \end{pmatrix}$$

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$$f(x)=\int_{-\infty}^\infty\widehat f\xi\,e^{2\pi i\xi x}\,d\xi$$

$$f(x)=\int_{-\infty}^\infty\widehat f\xi,e^{2\pi i\xi x},d\xi$$

$$m_2 \times \frac {v^2}{r} = G \times \frac {m_1 \times m_2}{r^2}$$

$$\xcancel{m_2} \times \frac {v^2}{\xcancel{r}} = G \times \frac {m_1 \times \xcancel{m_2}}{\xcancel{r} \times r}$$

$$v^2 = G \times \frac{m_1}{r}$$

$$m_1 = \frac{v^2 \times r}{G}$$

$$m_1 = \frac {v^2 \times (\frac{米^2}{秒^2}) \times (r \times 米)}{G \times (\frac{米^3}{Kg \times 秒^2})}$$

$$m_1 = \frac {v^2 \times r \times (\frac{米^3}{秒^2}) }{G \times (\frac{米^3}{秒^2}) \times \frac{1}{Kg}}$$

$$m_1 = \frac {v^2 \times r \times \xcancel {(\frac{米^3}{秒^2})} }{G \times \xcancel {(\frac{米^3}{秒^2})} \times \frac{1}{Kg}}$$

$$m_1 = \frac {v^2 \times r}{G} (Kg)$$