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A4-format til udskrift. - Aarhus Universitet

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II<br />

Integration<br />

1. Dobbelt integral<br />

1.1. Oversigt ☞ [S] 5.2, 5.4, 12.1<br />

Nøgleord og begreber<br />

✌ Bestemt integral<br />

✌ Areal<br />

✌ Riemann summer<br />

✌ Volumen<br />

✌ Dobbelt integral<br />

✌ Test dobbelt integral<br />

✌ Riemann dobbeltsummer<br />

✌ Nyttige regneregler for integral<br />

✌ Test integral regneregler<br />

1.2. Genoplev integralet ☞ [S] 5.2 The definite integral<br />

2 Definition<br />

Intervallet [a,b] inddeles i n stykker af længde ∆x = b−a<br />

n<br />

a = x0 ≤ · · · ≤ xi−1 ≤ x ∗ i ≤ xi ≤ · · · ≤ xn = b<br />

Det bestemte integral af en kontinuert funktion f : [a,b] → R er<br />

b<br />

f(x)dx = lim<br />

a<br />

n<br />

f(x<br />

n→∞<br />

i=1<br />

∗ i )∆x<br />

1.3. Giver areal ☞ [S] 5.2 The definite integral<br />

Figur<br />

y<br />

a b<br />

Integralet er arealet<br />

1.4. Riemann summen ☞ [S] 5.2 The definite integral<br />

73<br />

x

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