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Unformatted text preview: Math 105 — First Midterm October 12, 2009 Name: Instructor: Section: 1. Do not open this exam until you are told to do so. 2. This exam has 10 pages including this cover. There are 9 problems. Note that the problems are not of equal difficulty, so you may want to skip over and return to a problem on which you are stuck. 3. Do not separate the pages of this exam. If they do become separated, write your name on every page and point this out to your instructor when you hand in the exam. 4. Please read the instructions for each individual problem carefully. One of the skills being tested on this exam is your ability to interpret mathematical questions, so instructors will not answer questions about exam problems during the exam. 5. Show an appropriate amount of work (including appropriate explanation) for each problem, so that graders can see not only your answer but how you obtained it. Include units in your answer where that is appropriate. 6. You may use any calculator except a TI92 (or other calculator with a full alphanumeric keypad). However, you must show work for any calculation which we have learned how to do in this course. 7. If you use graphs or tables to find an answer, be sure to include an explanation and sketch of the graph, and to write out the entries of the table that you use. 8. Turn off all cell phones and pagers , and remove all headphones. Problem Points Score 1 8 2 11 3 12 4 6 5 14 6 18 7 6 8 16 9 9 Total 100 Math 105 / Exam 1 (October 12, 2009) page 2 1 . [8 points] For each statement below, circle TRUE if the statement is always true. Otherwise, circle FALSE. For this problem, justifications for your answers are not expected. a . [2 points] The average rate of change of f ( x ) = 10 x 2 on the interval 1 ≤ x ≤ 2 is given by the ratio (10 1 2 ) (10 2 2 ) 2 1 . True False b . [2 points] In the function defined below, Q 1 (0) = 2. P 1 2 3 5 Q ( P ) 5 13 12 1 True False ( Q (2) = 0; the function is invertible as defined, so Q 1 (0) = 2.) c . [2 points] The function Q ( t ) = 9 e kt is decreasing when 0 < k < 1. True False (The function is increasing for any positive k .) d . [2 points] If f ( t ) is a linear function with a negative average rate of change, then the graph of f ( t ) is concave down....
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This note was uploaded on 01/28/2012 for the course MATH 105 taught by Professor Rhea during the Fall '08 term at University of Michigan.
 Fall '08
 Rhea
 Math

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