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Exercicios resolvidos James Stewart vol. 2 7ª ed - ingles

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84 0 CHAPTER 11 INFINITE SEQUENCES AND SERIES<br />

9.<br />

11.<br />

13.<br />

15.<br />

n<br />

0<br />

1<br />

2<br />

3<br />

4<br />

n<br />

0<br />

1<br />

2<br />

3<br />

4<br />

n<br />

0<br />

1<br />

2<br />

3<br />

4<br />

5<br />

6<br />

n<br />

0<br />

1<br />

2<br />

3<br />

(o) =<br />

f (n)(x) J (n) (0)<br />

{ 1 so sinhx= I: ( ifn is odd 2<br />

_ ) 1<br />

•<br />

n=o n+1.<br />

sinh x 0<br />

x2n+l<br />

Use the Ratio Test to find R. If an = ( )I, then<br />

cosh x 1<br />

2n + 1 .<br />

sinhx 0<br />

r I<br />

cosh x 1<br />

sinhx 0<br />

= 0 < 1 for all x, so R = oo.<br />

J Cnl(x) J(nl (l)<br />

x 4 - 3x 2 4 t :!012 Cengnge Lc:unin~ . All Rights Rcscn1:d. ~ tay not be SCnMCd. copk-d. or duplicat<strong>ed</strong>, or postct.l loa publicly ncccs.~i blc wcbsilt:, in whole or in part.

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