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

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2133<br />

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1<br />

~~ * V&~^<br />

Answers 445<br />

J dx / (x, y) dy + dx<br />

" j<br />

J J<br />

"<br />

4-<br />

/ (x. y) dy = dy<br />

J<br />

2134. \ dx \<br />

2 V9 -X* 2 Vl + *<br />

J<br />

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

/ (x, y) dx + J dy<br />

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

f (dx C /(*, y)dy = f dy C f(x, y)dx +<br />

c/ i/ t/ j<br />

r r<br />

/(x, y) dx+ \ dy \ /(x,<br />

J J<br />

J<br />

\y<br />

f (x, y)dx. 2135. a)<br />

j<br />

J dx j f (x, y) dy = f (x. y) dxt<br />

Jdy J<br />

EHi _L. _!L<br />

2 - x* a Va* -t/' i Vx - x*<br />

b) dx f (x> y) dy = * f (Xt y) dx ' c) d* f(x><br />

P ~ a -<br />

dy \ / (x, y) dx; d)<br />

'a 1 - Ki~^ -1 * - 1 -<br />

2<br />

a [/ + 2u ax 2a a ta a<br />

oo a o 2(j * 2a<br />

48 ^ S 2 T SI<br />

2136. f dy \ / (x, y) dx. 2137. \ dy \ f (x, y) dx + \ dy \ / (x, y) dXr<br />

2138. j dy<br />

JL Ji<br />

2<br />

JL<br />

12 < 3<br />

j<br />

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

J<br />

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

rr<br />

*. ffMir.

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