Spring2016-Math1241-Common.mnafsi.Sec1.2

# Answers submitted incorrect correct xˆ3 927 xˆ3 3 x

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Answer(s) submitted: (incorrect) Correct Answers: 27 - 729/xˆ3 0 9/(27 - xˆ3) 3 x 0 27 - ( 27 - xˆ3)ˆ3 -INF INF 12. (1 point) Book Exercise 41 Let f ( x ) = 1 x - 7 and g ( x ) = x + 6 x . Find ( f g )( x ) = , ( g f )( x ) = . Answer(s) submitted: (incorrect) Correct Answers: 4

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x/(xˆ2- 7*x+ 6) 6*x-42+1/(x-7) 13. (1 point) Book Exercise 43 Suppose that f ( x ) = x + 8 , g ( x ) = x 2 + 4 , and h ( x ) = x + 9 . Find ( f g h )( x ) = Answer(s) submitted: (incorrect) Correct Answers: sqrt{(x+ 9)ˆ2 +12} 14. (1 point) Book Exercise 45 Express the function F ( x ) = ( x 2 - 6 ) 5 in the form f g . f ( x ) = g ( x ) = Answer(s) submitted: (incorrect) Correct Answers: x**(5) x**2 - 6 15. (1 point) Book Exercise 47 Express the function F ( x ) = cos x in the form f g . f ( x ) = g ( x ) = Answer(s) submitted: (incorrect) Correct Answers: x**(1/2) cos x 16. (1 point) Book Exercise 52 Use the table to evaluate each expression. x 4 1 36 0 - 8 - 3 f ( x ) 97 4 49249 1 - 383 - 8 g ( x ) - 48 0 - 45360 0 576 36 g ( f ( - 3 )) = f ( f ( - 3 )) = ( f + g )( - 3 ) = f ( 1 ) / ( g ( 1 )+ 5 ) = ( fg )( 1 ) = Answer(s) submitted: (incorrect) Correct Answers: 576 -383 28 0.8 0 17. (1 point) Book Exercise 53 For the function f ( x ) and g ( x ) given in the graph find the corresponding function values.
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