$\Delta f(x, d x)$

x

x + dx

Tangente

$df(x, dx)$

Sekante

f(x)

f(x + dx)

$x + d x$

$f(x)$

$f(x + dx)$

$x$

$dx$

f(x) = (0.005 * x^(3)) + (0.05 * x^(2)) + 1
P = Point(f)
Q = Point(f)
C: (x(Q), y(P))
h = Segment(P, C)
i = Segment(C, Q)
A = (17.2, 6.32)
B: (x(Q), (y(C) + y(Q)) / 2)
u = Vector(A, B)
D: (x(P), 0)
E: (x(Q), 0)
t = Tangent(P, f)
j = Line(C, Q)
F = Intersect(j, t)
k = Segment(C, F)
G = (17.28, -6.58)
H: (x(Q), (y(C) + y(F)) / 2)
v = Vector(G, H)
s = Line(P, Q)
g = Segment(P, D)
K: (0, y(P))
l = Segment(K, P)
R: (0, y(Q))
m = Segment(R, Q)
K1: (-0.5, y(P))
K2: (-0.5, y(Q))
K3: ((x(Q) + x(P)) / 2, y(P))
n = Segment(C, E)