public void CheckFindNthRootException(double number, int degree, double precision, double expected) =>
 Assert.Throws <ArgumentException>(
     () => { FindingRoots.FindNthRoot(number, degree, precision); });
 public double CheckFindNthRootNormal(double number, int degree, double precision)
 {
     return(FindingRoots.FindNthRoot(number, degree, precision));
 }