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Thomas Calculus 13th [Solutions]

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68 Chapter 2 Limits and Continuity<br />

(b)<br />

(c)<br />

f 2<br />

9 ( 3)( 3)<br />

( x ) x x x<br />

3<br />

x 3 x 3<br />

x if x 3, and lim ( x 3) 3 3 6.<br />

x 3<br />

68. (a)<br />

(b)<br />

2<br />

g( x) ( x 2)/ x 2<br />

x 1.4 1.41 1.414 1.4142 1.41421 1.414213<br />

g( x ) 2.81421 2.82421 2.82821 2.828413 2.828423 2.828426<br />

(c)<br />

69. (a)<br />

(b)<br />

g 2 2 2<br />

( x x x<br />

) x 2<br />

x 2 if x 2, and lim x 2 2 2 2 2.<br />

x 2 x 2<br />

x 2<br />

G( x) ( x<br />

2<br />

6)/( x 4x<br />

12)<br />

x 5.9 5.99 5.999 5.9999 5.99999 5.999999<br />

G( x ) .126582 .1251564 .1250156 .1250015 .1250001 .1250000<br />

x 6.1 6.01 6.001 6.0001 6.00001 6.000001<br />

G( x ) .123456 .124843 .124984 .124998 .124999 .124999<br />

(c) G( x) x 6 x 6 1 if x 6, and lim 1 1 1<br />

2<br />

( x 4x<br />

12) ( x 6)( x 2) x 2<br />

x 6 x 2 6 2 8<br />

0.125.<br />

Copyright<br />

2014 Pearson Education, Inc.

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