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

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70 Differentiation of Functions [Ch. 2<br />

d*u I * 2 = ln(l-f-/ ),<br />

697. F<strong>in</strong>d for<br />

^2 /=0, if ax<br />

{<br />

\ y = t .<br />

698. Show that y (as a function of x) def<strong>in</strong>ed by the tions x == s<strong>in</strong> t, y = ae'<br />

equa-<br />

^2 + be~ iV *<br />

for any constants a and 6<br />

satisfies the differential equation<br />

In the follow<strong>in</strong>g examples f<strong>in</strong>d y'" = ^.<br />

699. {<br />

x = ( sec, x = e f -1 '<br />

,<br />

701. <<br />

\ y = tan/. 1 r/ = / s<br />

{x<br />

= ^"'cos/, ^<br />

y-e-

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