def test_adding_terms_in_polynomial_return_derivative(self):
term1 = Term(2, 3)
term2 = Term(3, 1)
term3 = Term(1, 0)
term_1 = Term(1, 4)
term_2 = Term(10, 3)
poly1 = Polynomial([term1, term2, term3])
poly2 = Polynomial([term_1, term_2])
res1 = poly1.derivative()
res2 = poly2.derivative()
self.assertEqual(res1, '6*x^2+3')
self.assertEqual(res2, '4*x^3+30*x^2')
def test_adding_one_term_which_is_constant_in_polynomial_return_derivative_zero(
self):
term1 = Term(2, 0)
poly = Polynomial([term1])
res = poly.derivative()
self.assertEqual(res, '0')
def test_adding_one_term_which_is_coefficient_and_variable_in_polynomial_return_derivative_constant(
self):
term1 = Term(2, 1)
poly = Polynomial([term1])
res = poly.derivative()
self.assertEqual(res, '2')
def test_adding_terms_reversed_in_polynomial_return_derivative(self):
term1 = Term(2, 0)
term2 = Term(3, 1)
term3 = Term(4, 2)
poly = Polynomial([term1, term2, term3])
res = poly.derivative()
self.assertEqual(res, '3+8*x')
from polynomials import Polynomial import numpy as np import matplotlib.pyplot as plt # https://www.python-course.eu/matplotlib_legends_and_annotations.php p = Polynomial(2, 3, -4, 6) p_der = p.derivative() print(p) print(p_der) fig, ax = plt.subplots() X = np.linspace(-2, 3, 50, endpoint=True) F = p(X) F_derivative = p_der(X) ax.plot(X, F, label="$" + str(p) + "$") ax.plot(X, F_derivative, label="$" + str(p_der) + "$") ax.legend(loc='upper left') plt.show()
