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Math 1041 Answer Key to Beginning of Semester Review Problems Spring 2011 Section 1.1. Exercises 9. - 8 < x < 8 15. (2 , 6) 19. ( -∞ , 2) (6 , ) 24. ( - 1 , 0) 34. ( a ) d = 2 2 ( b ) d = 3 ( c ) d = 13 ( d ) d = 37 -2 -1 0 1 2 3 4 5 -2 -1 0 1 2 3 4 5 x y -2 -1 0 1 2 3 4 5 -2 -1 0 1 2 3 4 5 x y -2 -1 0 1 2 3 4 5 -4 -3 -2 -1 0 1 2 3 x y -4 -3 -2 -1 0 1 2 3 4 -4 -3 -2 -1 0 1 2 3 x y 35. ( x - 2) 2 + ( y - 4) 2 = 3 2 = 9 36. ( x - 2) 2 + ( y - 4) 2 = ( 26) 2 = 26 41. D g = R (all real numbers); R g = { y : y 0 } or D g = ( -∞ , ); R g = [ 0 , ) 42. D f = R ; R f = R or D f = ( -∞ , ); R f = ( -∞ , ) 43. D g = { t : t 2 } ; R g = { y : y 0 } or D g = ( -∞ , 2 ]; R g = [ 0 , ) 44. D f = R ; R f = { y : y 0 } or D f = ( -∞ , ); R f = [ 0 , ) 45. D h = { s : s 6 = 0 } ; R h = { y : y 6 = 0 } or D h = ( -∞ , 0) (0 , ); R h = ( -∞ , 0) (0 , ) 47. D g = R ; R g = { y : y 2 } or D g = ( -∞ , ); R g = [ 2 , ) 48. D g = { t : t 6 = 0 } ; R g = { y : - 1 y 1 } or D g = ( -∞ , 0) (0 , ); R g = [ - 1 , 1 ] 59. ( B ) is the graph of a function. ( A

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