code: def _poly_fjacd(B, x, powers):
      b = B[1:]
      b.shape = (b.shape[0], 1)
  
      b = b * powers
  
      return np.sum(b * np.power(x, powers - 1), axis=0)
  
imports: import numpy
  from scipy.odr.odrpack import Model
label_desc: Use image node_id 7 for calling a global function with example usage: _poly_fjacd(B, x, powers) and returns: np