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

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200_Functions of Several Variables_[Ch. 6<br />

[provided that f(0, 0) = 0] we have<br />

rxy(' 0)=-1, /;,(0, 0)=+1.<br />

1903 - F<strong>in</strong>d &$" z = f(u, v),<br />

where u = x* + y*, v = xy.<br />

1904. F<strong>in</strong>d if u g = f(x, y, z),<br />

where z y(x, y).<br />

z = f(u, v), where u = z > '>- e<br />

(x-x )* + (y-y n )*<br />

(where * , // , z , a are constants) satisfies the equation of heat<br />

conduction<br />

^a'/^-u^U*^

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