MathPHP\Statistics\Average::heronianMean PHP Метод

Heronian mean https://en.wikipedia.org/wiki/Heronian_mean __ H = ⅓(A + √AB + B)

public static heronianMean ( number $A, number $B ) : number
$A	number
$B	number
Результат	number

    public static function heronianMean($A, $B)
    {
        return 1 / 3 * ($A + sqrt($A * $B) + $B);
    }

Average