Python解高数：求解函数极限

题目

步骤

安装sympy包

打开命令行，输入：

pip install sympy​

Looking in indexes: https://pypi.doubanio.com/simple/
Collecting sympy
  Downloading https://pypi.doubanio.com/packages/ff/69/b16fc81b939d3efdd0b552f2e3e54f7fa1423d0c320cced2e69e675dde26/sympy-1.7.1-py3-none-any.whl (5.9MB)
Collecting mpmath>=0.19 (from sympy)
  Downloading https://pypi.doubanio.com/packages/d4/cf/3965bddbb4f1a61c49aacae0e78fd1fe36b5dc36c797b31f30cf07dcbbb7/mpmath-1.2.1-py3-none-any.whl (532kB)
Installing collected packages: mpmath, sympy
Successfully installed mpmath-1.2.1 sympy-1.7.1

WARNING: You are using pip version 19.2.3, however version 21.0.1 is available.
You should consider upgrading via the 'python -m pip install --upgrade pip' command.

第1题

from sympy import *

x = symbols('x')

limit(1/(x+1)-2/(x**3-2),x,1)

​ 结果：

52

第2题

from sympy import *

x,n = symbols('x n')

print(limit(((3*x-2)/(x+3))**n,x,oo))

结果：

3**n