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

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Sec. 1] The Double Integral <strong>in</strong> Rectangular Coord<strong>in</strong>ates 251<br />

*<br />

2147. \ \ , r<br />

JJ V a<br />

===, where S is a part of a circle of radius<br />

2<br />

(S)<br />

x*y*<br />

r<br />

a with centre at 0(0, 0) ly<strong>in</strong>g <strong>in</strong> the first quadrant.<br />

2148. $ $ V** y 2 dx dy t where S is a triangle with vertices<br />

(S)<br />

0(0,0), A (I, -1), and fl(l, 1).<br />

2149. \j !/"*# y*dxdy, where S is a triangle with vertices<br />

(S)<br />

0(0, 0), 4(10, 1), and fl(l, 1).<br />

rr -<br />

2150. J J e y dxdy, where S is a curvil<strong>in</strong>ear triangle OAB bound-<br />

(S)<br />

ed by the parabola y* = x and the straight l<strong>in</strong>es x = Q, (/=!<br />

(Fig. 91).<br />

2151. ff^Ti, where S is a parabolic segment bounded by<br />

-<br />

the parabola y=7f and the straight l<strong>in</strong>e y = x.<br />

2152. Compute the <strong>in</strong>tegrals and draw the regions over which they<br />

extend:<br />

at i-f-cosjc<br />

a) \dx [ tfsmxdy;<br />

j j<br />

b)<br />

2 1<br />

"<br />

COS*<br />

_rt<br />

2<br />

c) $

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