x

y(S)

F'(x) = 2x

F(x)=x^2

O: (0, 0)
t = 3 (slider from 0 to 3, step 0.1)
f(x) = If[0 ≤ x, (2 * x)]
T: (t, (2 * t))
g = Line(T, yAxis)
A = Intersect(g, xAxis)
t1, p, o, a = Polygon(O, A, T)
P: (t, t1)
S: (0, t1)
i = Segment(S, P)
b: y(S)
testo1: "" + (LaTeX[b]) + ""
h(x) = If[0 ≤ x ≤ t, x^(2)]