Drawing sympy limit function matplotlib
import matplotlib.pyplot as plt
import numpy as np
from sympy import *
n=np.array([i for i in range(201)])
y=n/(3*n+1)
plt.figure(figsize=(8,8))
plt.plot(n,y)
x=symbols('x')
f=x/(3*x+1)
x=limit(f,x,np.inf)
print("x=",x)
plt.show()
