title: Find Harmonic Mean Using Arithmetic Mean Geometric Mean
signature: function findHarmonicMeanUsingArithmeticMeanGeometricMean($a, $b) {
test_code: <?php
  
  
  // SOLUTION CODE 
  // ============================================
  PLACEHOLDER_CODE_BODY
  
  // TESTING CODE 
  // ============================================
  function validateSolution($actual, $expected){
      return abs($actual - $expected) < 1e-09;
  }
  
  function driver($a, $b, $expected){
      try{
        if (validateSolution(PLACEHOLDER_FN_NAME($a, $b), $expected)){
          return "PASSED";
        }
        return "FAILED";
      }
      catch (Exception $exception_obj) {
        return get_class($exception_obj);
      }
  }
  
  function main(){
      printf("TEST-0...%s\n",driver(
        54, 83, 
        65.43065693430657));
      
      printf("TEST-1...%s\n",driver(
        42, 56, 
        48.0));
      
      printf("TEST-2...%s\n",driver(
        63, 12, 
        20.16));
      
      printf("TEST-3...%s\n",driver(
        19, 76, 
        30.4));
      
      printf("TEST-4...%s\n",driver(
        41, 50, 
        45.054945054945065));
      
      printf("TEST-5...%s\n",driver(
        7, 26, 
        11.030303030303031));
      
      printf("TEST-6...%s\n",driver(
        39, 42, 
        40.444444444444436));
      
      printf("TEST-7...%s\n",driver(
        11, 64, 
        18.773333333333333));
      
      printf("TEST-8...%s\n",driver(
        96, 81, 
        87.86440677966101));
      
      printf("TEST-9...%s\n",driver(
        15, 54, 
        23.47826086956522));
      
  }
  
  main();
  ?>
source_py: def find_harmonic_mean_using_arithmetic_mean_geometric_mean(a, b):
      AM = ((a + b) / 2)
      GM = math.sqrt((a * b))
      HM = ((GM * GM) / AM)
      return HM
source_cpp: double find_harmonic_mean_using_arithmetic_mean_geometric_mean(int a, int b) {
    double AM, GM, HM;
    AM = ( a + b ) / 2;
    GM = sqrt ( a * b );
    HM = ( GM * GM ) / AM;
    return HM;
  }