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Summary Graad 12 Derdegraadse Funksies

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‘n Visuele verduideliking van differensialerekening grafieke

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DERDEGRAADSE FUNKSIE




Vorm van Draaipunt/
grafiek Stationêre punt Draaipunt




nt
Bu
Maksima Maksima




pu
i
gp




ig
un




Bu
t
Minima Minima



Draaipunt Draaipunt


a>1 (Positief) a<1 (Negatief)

y=ax3+bx2+cx+d

Formules te f(x)=y y-waarde
doen met
die raaklyn f’(x)=m Gradiënt/Helling van raaklyn

Verskillende f(x)=0 y-waarde van die Draaipunt of Buigpunt
punte op
grafiek f’(x)=0 Draaipunt of Stationêre punt (Twee punte)

f’’(x)=0 Buigpunt (Een punt)

x-Afsnit y=0

y=a(x-x1)(x-x2)(x-x3)

y-afsnit x=0

y=d

Konkaaf Op m=f’’(a)>0 dan is f konkaaf op by
x=ao(Lokale Minima)
Die x-koördinaat van die buigpunt
Konkaaf Af m=f’’(a)>0 dan is f konkaaf af by
x=ao(Lokale Maksima)

Stygend m=f’(a)>0 dan is f stygend by x=a Die x-koördinaat van die stationêre
punt/draaipunt
Dalend m=f’(a)<0 dan is f dalend by x=a

Lokale Die x-koördinaat (x=a) waar die grafiek konkaaf op is
Minima

Lokale Die x-koördinaat (x=a) waar die grafiek konkaaf af is
Maksima

Document information

Schooljaar
200
Uploaded on
August 28, 2026
Number of pages
1
Written in
2026/2027
Type
Summary
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