UNIVERSITY OF SASKATCHEWANDepartment of Mathematics & StatisticsMathematics 123.3 Final Examination9:00 A.M., Friday, December 11, 1998Time:3 hoursInstructors:Browne, Chigogidze, MacLean, SongCLOSED BOOK — NO CALCULATORS PERMITTEDThe first part of this examination consists of 12 multiple choice questions worth 5% each. Submit youranswers to these on the blue opscan sheet provided.The second part of this examination consists of 4 questions worth 10% each. Show all your work: nocredit will be given for unsubstantiated correct answers. Submit your answers to these on one of thebooklets provided.PART I.(Multiple Choice)The possible answers to the following two questions are in:ANSWER SET I.(A) (-6,6)(B) (4,6](C)[-6,∞)(D)[-4,∞)(E)(-∞,4](F)(-∞,6](G)[0,∞)(H)[4,∞)(I)[6,∞)(J) None of these1. Find the range of the functionf (x)= |x-1| +x-1.
2. The interval on whichf (x)=x√6-xis decreasing is: