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Zuletzt geändert von Holger Engels am 2026/10/17 14:38
Von Version 58.5
bearbeitet von Holger Engels
am 2026/10/12 09:29
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Auf Version 51.8
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12 12  Siehe dazu [[Rekonstruktion einer Größe>>https://kmap.eu/app/browser/Mathematik/Integralrechnung/Rekonstruktion%20einer%20Gr%C3%B6%C3%9Fe]] und [[Obersumme/Untersumme interaktiv>>https://kmap.eu/app/browser/Mathematik/Integralrechnung/Obersumme%20und%20Untersumme#erkunden]]
13 13  {{/lernende}}
14 14  
15 -== Bestandsrekonstruktion ==
15 +--Deu­tung des be­stimm­ten In­te­grals (Be­stands­re­kon­struk­ti­on, z. B. zu­rück­ge­leg­te Stre­cke bei ver­än­der­li­cher Ge­schwin­dig­keit, Flä­che)--
16 +--ge­krümm­te Rand­funk­ti­on--
17 +--Nä­he­rungs­wei­se Be­rech­nung von In­te­gra­len (z. B. Käst­chen­zäh­len, Ober- und Un­ter­sum­me)--
18 +Ori­en­tier­ter Flä­chen­in­halt (z. B. Zu- und Ab­fluss­men­ge)
19 +Ei­gen­schaf­ten des be­stimm­ten In­te­grals (In­ter­val­l­ad­di­ti­vi­tät, Li­nea­ri­tät des In­te­grals, In­te­gral­wert ist Null bei un­ge­ra­den Funk­tio­nen und zu x=0 sym­me­tri­schen In­te­gra­ti­ons­gren­zen)
16 16  
21 +== Bestandsrekonstruktion ==
17 17  {{aufgabe id="Gefäß" afb="I" kompetenzen="K4" quelle="[[KMap>>https://kmap.eu/app/browser/Mathematik/Integralrechnung/Rekonstruktion%20einer%20Gr%C3%B6%C3%9Fe]]" zeit="5"}}
18 18  Ein Gefäß sei zu Beginn der Beobachtung mit //10 l// gefüllt. Es wird folgender Zufluss/ Abluss beobachtet:
19 19  
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45 45  {{/aufgabe}}
46 46  
47 47  {{aufgabe id="Streifenmethode" afb="II" kompetenzen="" quelle="Holger Engels, Stefanie Walz" zeit=""}}
48 -[[image:Streifenmethode.svg||width=250 class=right]]Das Schaubild zeigt die Normalparabel {{formula}}f(x)= x^2{{/formula}} und die Streifen der Untersumme für //n =4// Streifen und einer Streifenbreite von {{formula}}\frac{b}{n}=\frac{1}{4}{{/formula}}. Allgemein bestimmt sich sich die Untersumme für die Streifen folgendermaßen:
53 +[[Streifenmethode.svg||width=300 class=right]]Das Schaubild zeigt die Normalparabel {{formula}}f(x)= x^2{{/formula}}. Für //n// Streifen und einer Streifenbreite von {{formula}}\frac{b}{n}{{/formula}} ergibt sich die Untersumme folgendermaßen:
49 49  
50 -{{formula}}
51 -\begin{aligned}
52 -U_n &= \Delta x \cdot f(1\cdot\Delta x) + \Delta x \cdot f(2\cdot\Delta x) + ... + \Delta x \cdot f(n\cdot\Delta x) \\
53 -\text{} &= \Delta x \cdot (1\cdot \Delta x)^2 + \Delta x \cdot (2\cdot \Delta x)^2 + ... + \Delta x \cdot (n\cdot \Delta x)^2
54 -\end{aligned}
55 -{{/formula}}
56 -
57 -... führt nach einigen Umformungen schließlich zu ...
58 -
55 +{{formula}}U_n = \Delta x \cdot f(1\cdot\Delta x) + \Delta x \cdot f(2\cdot\Delta x) + ... + \Delta x \cdot f(n\cdot\Delta x){{/formula}}
56 +{{formula}}U_n = \Delta x \cdot (1\cdot \Delta x)^2 + \Delta x \cdot (2\cdot \Delta x)^2 + ... + \Delta x \cdot (n\cdot \Delta x)^2{{/formula}}
57 +... führt schließlich zu ...
59 59  {{formula}}U_n = b^3\frac16(2+\frac3n+\frac1{n^2}){{/formula}}
60 -
61 -Berechne den Wert dieser Summe für unterschiedliche //n//.
59 +Berechne den Wert der Summe für unterschiedliche //n//.
62 62  (%class="border slim"%)
63 -|=//n//| 4 | 8 | 100
61 +|=n| 4 | 8 | 100
64 64  |={{formula}}U_n{{/formula}}|||
65 -
66 -Betrachte den Term und begründe, gegen welchen Wert er für {{formula}}n\rightarrow\infty{{/formula}} strebt.
63 +Betrachte den Term und begründe, gegen welchen Wert er für {{formula}}n\rightarrow}infty{{/formula}} strebt.
67 67  {{/aufgabe}}
68 68  
69 69  == Bestimmtes Integral ==
70 70  
71 -{{aufgabe id="Bestimmtes Integral" afb="I" kompetenzen="K5" quelle="Holger Engels" zeit="7"}}
72 -Bestimme den Wert des Integrals:
73 -(%class="abc horiz"%)
74 -1. ((({{formula}}\int_0^\pi \sin(x) \cdot dx{{/formula}})))
75 -1. ((({{formula}}\int_0^{2\pi} \sin(x) \cdot dx{{/formula}})))
76 -1. ((({{formula}}\int_0^1 e^x \cdot dx{{/formula}})))
77 -{{/aufgabe}}
78 -
79 -{{aufgabe id="Bestimmtes Integral vs Fläche" afb="I" kompetenzen="K1, K6" quelle="Holger Engels" zeit="5"}}
80 -Gegeben ist der Graph einer Funktion //f//, der die x-Achse bei {{formula}}x = 2{{/formula}} schneidet. Die Teilfläche unterhalb der x-Achse im Intervall {{formula}}[0; 2]{{/formula}} beträgt 3 FE, die Teilfläche oberhalb im Intervall {{formula}}[2; 5]{{/formula}} beträgt 7 FE.
81 -(%class=abc%)
82 -1. Bestimme den Wert des Integrals {{formula}}\int_{0}^{5} f(x)\,dx{{/formula}}.
83 -1. Bestimme den geometrischen Flächeninhalt, den der Graph von f mit der x-Achse über {{formula}}[0; 5]{{/formula}} einschließt.
84 -1. Erkläre den Unterschied zwischen dem Wert des bestimmten Integrals und dem Flächeninhalt zwischen Graph und x-Achse.
85 -{{/aufgabe}}
86 -
87 87  == Eigenschaften ==
88 -
89 -{{aufgabe id="Eigenschaften erläutern" afb="II" kompetenzen="K6" quelle="" zeit="6"}}
90 -Veranschauliche und begründe anhand einer Skizze oder anhand der Flächenbilanz, warum folgende Rechenregeln für stetige Funktionen gelten:
91 -(%class="abc horiz"%)
92 -1. ((({{formula}}\int_{a}^{b} f(x)\,dx + \int_{b}^{c} f(x)\,dx = \int_{a}^{c} f(x)\,dx{{/formula}})))
93 -1. ((({{formula}}\int_{a}^{b} c \cdot f(x)\,dx = c \cdot \int_{a}^{b} f(x)\,dx{{/formula}})))
94 -{{/aufgabe}}
95 -
96 96  {{aufgabe id="Integraleigenschaften" afb="II" kompetenzen="K1" quelle="Debora Kemm, Benjamin Kaiser" zeit="10"}}
97 -Ermittle eine aufsteigende Reihenfolge für den Wert der folgenden Integrale
98 -(% style="display:flex"%)(((
99 -((({{formula}}\int_{-5}^{5} e^{x+4} \, dx{{/formula}})))
100 -((({{formula}}\int_{-5}^{5} e^{x-4} \, dx{{/formula}})))
101 -((({{formula}}\int_{-5}^{5} (-x^5 + 4x^3-2x)\, dx{{/formula}})))
102 -((({{formula}}\int_{-5}^{5} (\cos(\frac{1}{2}x)-3)\, dx{{/formula}})))
103 -)))
70 +Ermittle eine aufgsteigende Reihenfolge für den Wert der folgenden Integrale
71 +(%class=abc%)
72 +1. {{formula}}\int_{-5}^{5} e^{x+4} \, dx{{/formula}}
73 +1. {{formula}}\int_{-5}^{5} e^{x-4} \, dx{{/formula}}
74 +1. {{formula}}\int_{-5}^{5} (-x^5 + 4x^3-2x)\, dx{{/formula}}
75 +1. {{formula}}\int_{-5}^{5} (\cos(\frac{1}{2}x)-3)\, dx {{/formula}}
104 104  {{/aufgabe}}
105 105  
106 106  {{aufgabe id="Bilanz null" afb="II" kompetenzen="K2, K5" quelle="Holger Engels" zeit="8"}}
Streifenmethode.ggb
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