\text{See directions for using this file at }\



http://batmath.it/corsi\_uni/maths\_1617/maths\_1617.htm

f(x) = x^(2) - x + 1
P = Point(f)
a = 1.2 (slider from -3 to 3, step 0.1)
Q: (x(P) + a, f(x(P) + a))
secant = Line(P, Q)
tangent = Tangent(P, f)