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152E3-S09

# 152E3-S09 - MA 15200 1 Exam 3A Spring 2009 Write an...

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MA 15200 Exam 3A Spring 2009 1 1) Write an equation to represent this variation using k as the constant of proportionality. y varies directly as the square of x and inversely as w ( 29 2 2 2 2 A B C D E y kx w kx y w x y kw y k x w k x y w = = = = = 2) Find the domain (in interval notation) for the function below. x x f - = 2 ) ( ) 2 , ( E ) , 0 [ D ] 2 , ( C ) , 2 [ B ) , 2 ( A -∞ -∞ 3) If ) 1 ( 2 ) ( - = x x x F , find and simplify ) 1 ( + x F . x x x F x x x F x F x x x F x x x F 1 ) 1 ( E 4 2 1 ) 1 ( D 2 1 ) 1 ( C 2 2 1 ) 1 ( B 2 1 ) 1 ( A + = + - + = + = + - + = + + = +

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MA 15200 Exam 3A Spring 2009 2 4) Which function would be represented by the graph below? Use your knowledge of how to graph polynomial functions. 4 ) ( E 4 5 ) ( D 8 10 2 ) ( C 4 5 ) ( B 4 5 ) ( A 4 2 4 2 4 2 4 2 + - = + - = + - = - + - = + - = x x f x x x f x x x f x x x f x x x f 5) Given the functions ( ) 3 4 and ( ) 4 , f x x g x x = + = - find the value of ) 21 )( ( - g f . Which choice describes this value? A
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152E3-S09 - MA 15200 1 Exam 3A Spring 2009 Write an...

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