InkSoul/content/mathematics/公式大全.md

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---
title: "《考研数学二》公式大全"
date: 2022-12-24T13:05:40+08:00
---
# 高等数学
## 函数,极限,连续
### 函数
#### 函数的定义
设在某个过程中有两个变量x和y对变量x在允许的范围内的每一个确定的值变量y按照某一确定的法则总有相应的值与之对应则称y为x的函数记为y=f(x)
# 线性代数
## 向量
### n维向量定义及其运算
#### 向量定义及其线性运算
1. 向量定义
$
n个数a_1,a_2,a_3,\cdots,a_n组成一个有次序的数组称为一个n维向量用\alpha = (a_1,a_2,\cdots,a_n)(称为行向量)或\alpha = (a_1,a_2,\cdots,a_n)^T(称为列向量)来表示。称a_i为第i个分量若干个同维列向量(或同维行向量)组成的集合称为向量组
$
2. 向量加法
$
\alpha + \beta = (a_1,a_2,\cdots,a_n)+(b_1,b_2,\cdots,b_n) = (a_1+b_1,a_2+b_2,\cdots,a_n+b_n)
$
3. 数乘向量
$j\alpha = k(a_1,a_2,\cdots,a_n) = (ka_1,ka_2,\cdots,ka_n)$
#### 线性组合与线性表出