import matplotlib.pyplot as plt
import numpy as np
%matplotlib inline
n = np.arange(1,1e5)
e = 6*n**(-2)
plt.plot(n,e,'-', lw=3)
plt.semilogy(n,e,'-', lw=3)
plt.loglog(n,e,'-', lw=3)
n = np.arange(1,100)
e = 4.0**(-n)
plt.plot(n,e,'-', lw=3)
plt.semilogy(n,e,'-', lw=3)
plt.loglog(n,e,'-', lw=3)