f(x) = (3 * x^(2)) - (3 * x) + 1
f' = Derivative(f)
A = Point(f)
a = OrthogonalLine(A, xAxis)
B = Intersect(f', a)
b = OrthogonalLine(B, a)
C = Intersect(yAxis, b)
c = Tangent(A, f)
a_1 = Slope(c)