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Integrais duplos e de linha

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22 <strong>Integrais</strong> Duplos<br />

(b)<br />

(c)<br />

(d)<br />

(e)<br />

(f)<br />

Z0<br />

√ y+1<br />

Z<br />

−1−<br />

√ y+1<br />

Z1<br />

Z<br />

1<br />

0 x2 Z2<br />

1<br />

Z1<br />

0<br />

Z1<br />

0<br />

Z<br />

x 2 dxdy<br />

Ã<br />

x3 !<br />

p dydx<br />

x4 + y2 log x<br />

Z<br />

y<br />

Z<br />

x<br />

0<br />

1<br />

1<br />

e −x dxdy<br />

e y/x dxdy<br />

x2ey4 dxdy<br />

8. Consi<strong>de</strong>re o integral duplo<br />

Z 1<br />

0<br />

Z 1−x<br />

dx<br />

− √ 1−x2 f(x, y) dy.<br />

Estabeleça a outra or<strong>de</strong>m <strong>de</strong> integração e calcule o valor do integral para f(x, y) =<br />

√ 2x.<br />

9. Inverta a or<strong>de</strong>m <strong>de</strong> integração no seguinte integral duplo<br />

Z 1<br />

0<br />

dy<br />

10. Consi<strong>de</strong>re o integral duplo<br />

Z √ y<br />

0<br />

f(x, y)dx +<br />

Z 1<br />

0<br />

Z 2<br />

1<br />

dy<br />

Z 2−y<br />

Z − ln y<br />

dy<br />

−1+ √ f(x, y)dx.<br />

y<br />

0<br />

f(x, y)dx.<br />

Inverta a or<strong>de</strong>m <strong>de</strong> integração e mostre que tem o valor 10<br />

63 paraocaso<strong>de</strong>f(x, y) =y2 .<br />

11. Determine o valor do integral duplo<br />

para f(x, y) =e y<br />

x +x .<br />

Z 1<br />

4<br />

0<br />

Z 1<br />

2<br />

dy<br />

+<br />

<br />

1−4y<br />

4<br />

1<br />

2 −<br />

<br />

1−4y<br />

4<br />

f(x, y) dx

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