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Problems in Mathematical Analysis.pdf - pwp.net.ipl.pt

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250 Mult<strong>ipl</strong>e and L<strong>in</strong>e Integrals [Ch. 7<br />

2138. \dx \ f(x, y)dy.<br />

2139. $ d*<br />

- -<br />

2141. \ dy \ f(x t y)dx.<br />

a VTZx^tf * V*-*<br />

2<br />

20<br />

J<br />

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

2140. Jdx J f(x 9 y)dy.<br />

2143.<br />

RVT<br />

A -V<br />

J d*J/(x,<br />

o o<br />

s<strong>in</strong> x<br />

2144. \dx J/(jc, /)d/.<br />

2142. \dy $/(*,<br />

yi<br />

~2<br />

t/)dy+ f(x. y)dy.<br />

Evaluate the follow<strong>in</strong>g double <strong>in</strong>tegrals:<br />

2145. ( [ xdxdy t where S is a triangle with vertices 0(0, 0),<br />

(S)<br />

A(\, 1), and B(0, 1).<br />

A(2,0)X<br />

Fig. 90 Fig. 91<br />

2146. ^xdxdy, where the region of <strong>in</strong>tegration Sis bounded<br />

(S)<br />

by the straight l<strong>in</strong>e pass<strong>in</strong>g through the po<strong>in</strong>ts A (2, 0), fi(0, 2)<br />

and by the arc of a circle with centre at the po<strong>in</strong>t C(0, 1), and<br />

radius 1 (Fig. 90).

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