f(x) = x^(-2.0)
T = (2, 0.25)
t_1 = Tangent(T, f)
ploscina1 = Integral(f, 1.0, 2.0)
A = Point(f)
t2(x) = -2.0 * x(A)^(-3.0) * x + y(A) + 2.0 * x(A)^(-2.0)
B = Root(t2)
ploscina2 = Integral(t2, 0.0, x(B))
C = (3.548867800140911, 2.0407503013241612)