f(x) = x3 - 2·x2 + 3
f'(x) = 3·x2 - 4·x
t(x) = f'(1.5) * (x - 1.5) + f(1.5) = 0.75·x + 0.75
n(x) = -1 / f'(1.5) * (x - 1.5) + f(1.5) = 31/8 - 4/3·x
Strecke auf der y-Achse
31/8 - 0.75 = 25/8 = 3.125
Skizze
Plotlux öffnen f1(x) = x3-2x2+3f2(x) = 0,75x+0,75f3(x) = 31/8-4/3·xZoom: x(-4…4) y(-1…5)