code: def aps06_f(x, n):
      r"""Exponential rapidly changing from -1 to 1 at x=0"""
      return 2 * x * np.exp(-n) - 2 * np.exp(-n * x) + 1
  
imports: from __future__ import division, print_function, absolute_import
  from random import random
  import numpy
  from scipy.optimize import zeros
label_desc: Use image node_id 28 for calling a global function with example usage: aps06_f(x, n) and returns: unknown