code: def pdf1(self, x, y):
      return np.power(x, 1) * np.power(y, 2) / beta(x, y)
  
imports: import unittest
  import numpy
  import numpy.testing
  from scipy.special import beta
  from scipy.stats import multivariate_normal
  from pgmpy.factors.continuous import ContinuousFactor
label_desc: Use image node_id 1 for calling the TestContinuousFactorMethods obj's underlying member method code with example usage: obj.pdf1(x, y) and returns: unknown