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Thomas Calculus 13th [Solutions]

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Section 1.2 Combining Functions; Shifting and Scaling Graphs 17<br />

74.<br />

2/3 2/3 2/3 2/3<br />

y f ( x) ( 2 x) [( 1)(2) x] ( 1) (2 x)<br />

2/3<br />

(2 x ) . So the graph of f ( x ) is the graph of<br />

2/3<br />

g( x)<br />

x compressed horizontally by a factor of 2.<br />

75. 76.<br />

77. (a) ( fg)( x) f ( x) g( x) f ( x)( g( x )) ( fg)( x ), odd<br />

(b)<br />

f ( ) ( )<br />

( x) f x f x f ( x ), odd<br />

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

g<br />

(c)<br />

(d)<br />

(e)<br />

g ( ) ( )<br />

( x) g x g x g ( x ), odd<br />

f f ( x) f ( x)<br />

f<br />

2 2<br />

f ( x) f ( x) f ( x) f ( x) f ( x) f ( x ), even<br />

2 2 2 2<br />

g ( x) ( g( x)) ( g( x)) g ( x ), even<br />

(f ) ( f g)( x) f ( g( x)) f ( g( x )) f ( g( x)) ( f g)( x ), even<br />

(g) ( g f )( x) g( f ( x)) g( f ( x )) ( g f )( x ), even<br />

(h) ( f f )( x) f ( f ( x)) f ( f ( x )) ( f f )( x ), even<br />

(i) ( g g)( x) g( g( x)) g( g( x )) g( g( x )) ( g g)( x ), odd<br />

78. Yes, f ( x ) 0 is both even and odd since f ( x) 0 f ( x ) and f ( x) 0 f ( x ).<br />

79. (a) (b)<br />

Copyright<br />

2014 Pearson Education, Inc.

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