TEOREMA DE GREEN
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6.1. EXTENSÃODO <strong>TEOREMA</strong><strong>DE</strong> <strong>GREEN</strong> 157<br />
C<br />
1 3<br />
C 1 4<br />
D4<br />
C 2 4<br />
L 3<br />
C<br />
D 2 3<br />
3<br />
L 4<br />
D<br />
1<br />
C 2 1<br />
L 1<br />
C 2 2<br />
D2<br />
L 2<br />
C 1 1<br />
C 1 2<br />
Figura6.13:<br />
i) Aplicando oteoremadeGreenem D 1 :<br />
∫∫ [ ∂F2<br />
D 1<br />
∂x − ∂F ] ∮<br />
1<br />
dxdy =<br />
∂y<br />
∂D + 1<br />
ii) Aplicando o teoremadeGreen em D 2 :<br />
∫∫ [ ∂F2<br />
D 2<br />
∂x − ∂F ] ∮<br />
1<br />
dxdy =<br />
∂y<br />
∂D + 2<br />
iii) Aplicando oteoremadeGreenem D 3 :<br />
∫∫ [ ∂F2<br />
D 3<br />
∂x − ∂F ] ∮<br />
1<br />
dxdy =<br />
∂y<br />
∂D + 3<br />
iv) Aplicando oteoremadeGreen em D 4 :<br />
∫∫<br />
Então,dei), ii), iii) eiv):<br />
[ ∂F2<br />
D 4<br />
∂x − ∂F ] ∮<br />
1<br />
dxdy =<br />
∂y<br />
∂D + 4<br />
4∑<br />
∫∫<br />
i=1<br />
[ ∂F2<br />
D i<br />
∂x − ∂F 1<br />
∂y<br />
∫<br />
F =<br />
∫<br />
F =<br />
∫<br />
F =<br />
∫<br />
F =<br />
C + 11<br />
C + 12<br />
C + 13<br />
C + 14<br />
∫<br />
F +<br />
L + 4<br />
∫<br />
F +<br />
L + 2<br />
∫<br />
F +<br />
L − 2<br />
∫<br />
F +<br />
L − 3<br />
] ∫<br />
dxdy =<br />
C + 1<br />
∫ ∫<br />
F + F +<br />
C − 21 L + 1<br />
∫ ∫<br />
F + F +<br />
C − 22 L − 1<br />
∫ ∫<br />
F + F +<br />
C − 23 L + 3<br />
∫ ∫<br />
F + F +<br />
C − 24 L − 4<br />
∫<br />
F +<br />
C − 2<br />
F.<br />
F.<br />
F.<br />
F.<br />
F.<br />
Exemplo 6.2.<br />
[1] Seja D a região limitada pela curva x 2 + y 2 = 9 externa ∫ ao retângulo de vértices (1, −1),<br />
(2, −1), (2,1) e (1,1), orientadapositivamente. Calcule (2x − y 3 )dx − xy dy.<br />
∂D +