public void TestPolDeriv()
{
polD = pol1.Derivate();
Assert.AreEqual("6x+2", polD.ToString());
Assert.AreEqual(1, polD.Degree);
polD.Derivate();
Assert.AreEqual("6x+2", polD.ToString());
polD = polD.Derivate();
Assert.AreEqual("6", polD.ToString());
polD = polD.Derivate();
Assert.AreEqual("0", polD.ToString());
}
//return the root of the derivate of degree 1
public double FindRootsLine()
{
double result;
if (degree == 1)
{
result = -coeffs[0] / coeffs[1];
}
else if (degree == 0)
{
throw new Exception("Polynome cannot be of degree 0");
}
else
{
Polynome polD = Derivate();
while (polD.Degree > 1)
{
polD = polD.Derivate();
}
result = -polD.Coeffs[0] / polD.Coeffs[1];
}
return(result);
}
