M17 LE3 Sem1 1011 - MATHEMATICS 17 Third Long Exam 1st Sem...

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Unformatted text preview: MATHEMATICS 17 Third Long Exam 1st Sem / AY 2010-2011 I. Write ONLY the CAPITAL letter corresponding to the best answer. Each correct answer merits you 1 point. 1. The graph of the inverse of a one-to-one function f is the reflection of the graph of f about the . A. y-axis B. x-axis C. line y = x 2. By Descartes’ Rule of Signs, how many positive roots does x 4- x 3 + x have? A. exactly 1 B. exactly 2 C. 2 or 0 3. By Descartes’ Rule of Signs, how many negative roots does x 4- x 3 + x have? A. exactly 1 B. 2 or 0 C. at least 1 4. If 5 x = 4, then x = . A. log 4 5 B. log 5 4 C. undefined 5. What is the domain of the function f ( x ) = ln( x- 5)? A. [5 , ∞ ) B. (5 , ∞ ) C. R II. Write ONLY the CAPITAL letter corresponding to the best answer. Each correct answer merits you 2 points. 1. If f = { (1 , 4) , (2 , 3) , (3 , 1) , (4 , 2) } , then ( f- 1 ◦ f- 1 )(1) = . A. 4 B. 3 C. 2 D. 1 2. What is the exact value of log √ 5 1 25 ?...
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M17 LE3 Sem1 1011 - MATHEMATICS 17 Third Long Exam 1st Sem...

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