Quiz1_Fall2007(1)_key

Quiz1_Fall2007(1)_key - MA 123 Arazyan, Spring 2008 Quiz#1...

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MA 123 Quiz#1 Arazyan, Spring 2008 Student Name _________Key_____ Discussion Section #___ BU ID#_______________ Show all your work for full credit. 1. (12 points) Given 9 ) ( 2 - = x x f , x x g cos ) ( = , and 3 ) ( x x h = . Find h g f , h f g , and f h g . Simplify your answer if possible. 9 ) (cos ) (cos )) ( ( 2 3 3 3 - = = = x x f x g f h g f OR 9 cos 3 2 - x ) 9 cos( ) 9 ) (( )) ( ( 6 2 3 3 - = - = = x x g x f g h f g 3 2 3 2 2 ) 9 cos( ) ) 9 (( )) 9 ( ( - = - = - = x x g x h g f h g 2. (8 points) Describe how the graph of 2 | 5 | 3 ) ( + + - = x x h is related to the graph of
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