code: def aps11_f(x, n):
      r"""Rational function with a zero at x=1/n and a pole at x=0"""
      return (n * x - 1) / ((n - 1) * x)
  
imports: from random import random
  import numpy
  from scipy.optimize import zeros
label_desc: Use image node_id 43 for calling a global function with example usage: aps11_f(x, n) and returns: unknown