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Kurvendiskussion

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Eine übersichtliche, verständliche Schritt für Schritt Anleitung zur Kurvendiskussion, mit genauen Erklärungen zu Nullstellen, Symmetrie, Wendepunkten, Extrema, Vorzeichenwechselkriterium, Ableitungen und Monotonie

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Written for

Institution
Secondary school
Study
Gymnasium
Course
School year
2

Document information

Uploaded on
July 12, 2025
Number of pages
5
Written in
2024/2025
Type
Class notes
Professor(s)
Herr kern
Contains
11- e2

Subjects

Content preview

Übung Arbeit

Höhere
Ableitungen
*
1 . f(x) = X
-
8x3 + X

f(x) = 4x3 -
24x2 + 1


f"(x) = 12x2 -
48X

f (x) =
24X -
48
ab = a
.



b
!
x
2
x . E T .
E * & E
*
2 f(x) 2x
g(x) Bsp +(x) 4
s(x) x
= = = = = = = = = = =
.
.




f(x) = -
2x S'(x) =
1x = 4X
=
- 1




2
f(x) = -
1 -
4x
-2
Monotonie und Extrempunkte =
- 4x =
-

4 .
1 . Monoton fallend X, -X f(x , ) f(Xz) =-

I
Monoton
Steigend X , X2 f(x , ) = f(x)

streng Monoton fallend X 11 X2 f(x , (f(x)

f(x , ( f(x2)
streng monoton
Steigend X, x2




2 Monotonieverhalten untersuchen
.

Graphisch
a) fallend
streng monoton





allf y-Achse : X =
=
X

b) keine Monotonie XI Xz auf X-Achse : Xi >
X ,


monoton

deswegen : ~




steisend
c) streng monoton
steigend 7



d) keine Monotonie




S 124104.




a) f(x) = X2 -
5x + 1 Nullstellen berechnen yon f'


f(x) = 2x -
5


0 =
2x -
5


5
*
!
Testeinsetzungen
-




!
f' (1 , 5) = -
20

~XGraph sit
t
'

+ (3 , 5) =
250




↳ für X-2 , 5 ist f(x) < 1


für X32 , 5 ist f(x) < I




Monotonieverhalten mit Monotoniekriterium

f(x) =
(x3 yx + + 4


f'(x) = x2 +
X 149
X , 2
= -=
X
1, 2
= -

z= t
E X0


f'(-2) für X-1 -für X-1 ist f(x) 0
= 2 >0
Streng Monoton
Steigend
f' (l) für für XO ist +(x) > 0
= 250
Streng Monoton
Steigend X0 -




f'(-0 5) = , -0 , 25 10
streng Monoton fallend für -
1x0 -für-1x0 ist f(x) 0

, Extrempunkte

f(x) = =x Ex +




1. Schritt : Ableiten


f(x) = x2 + X



f"(x) = 2x + 1




2
. Schritt : Notw Kriterium . +' (x) = 0


x2 + x = 0 Nullstellen best .




X(X +
1) = 0
&
*= X +
1 = 0


X2 =


. Schritt : hinreichendes Kriterium f" (x) 0
3


Nullstellen in f" eins.


f" (0) = 130 TP


f" ( 1) = -
-
1 -
0 HP




.
4 Schritt :
Y-Koordinaten berechnen


Nullstellen in feins.

0 20 2
f (0) =
7 .
+ = - TP(0(0)




13 2
+ ( 1) =
5 ( +
( x =

E -> HP( 1(5)
. -
- -
. -




Vorzeichenwechsel-Kriterium


f(x) =
-
-x* - +




1. Schritt : Ableiten


f(x) = - x3 Ex +




f"(x) = -



2x Ex +




. Schritt
2 :
f'(x) = 0



- x3 Ex + =
0 oder - x3 Ex + =
0 1 : x



x ( Ex + ) = 0 -


Ex Ex +
1 : ( -)

*
0 Ex E + = 0 X2 -

4X 1 pq

-


Ex - =
1 :
(5) =
2 12
X
=
Xe , z


x 1x =
=




. Schritt
3 : in f" eins. .




f"(0) = 0 = 0 Keine
Aussage !
f"(4) = -


3 .
42 + 4



f"(4) = 9,6
3240HP
+
-
6, 4 = -




4
. Schritt : Vorzeichenwechsel-Kriterium 5. Schritt : Y-Koordinaten berechnen
5




f!
Testeinsetzungen bei x: I und X = -1 bei in feins .


+ ( 1) -
= -

5 .

( 13
-
+
z.( -

1) + (0)
= Sattelpunkt bei 1010)




Ochpunkt
20


3
f) 1) -
=




bei (414 28)
,




5 1. 1 Keinzeichenwechsel !
2
t'(l) 13 f (4)
1128
.

= - + =


↳ SP
f'(1) = 70
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