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

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Sec. 3] Taylor's Series 313<br />

S<strong>in</strong>ce<br />

and<br />

Example 2. Expand <strong>in</strong> powers of x *) the function<br />

3<br />

Solution. Decompos<strong>in</strong>g the function <strong>in</strong>to partial fractions, we will have<br />

it follows that we f<strong>in</strong>ally get<br />

2 _ V^ i<br />

\\ n< l nx. n<br />

^^ ... ^ v ^^ 1<br />

j<br />

fi A> t<br />

n-Q<br />

/i = o n = Q n v<br />

The geometric progressions (4) and (5) converge, respectively, when |x| < 1<br />

n = o<br />

and |*|

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