Math121SampleQuiz1Sols

# Math121SampleQuiz1Sols - QUIZ#1(SAMPLE QUESTIONS PART 1(NO...

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QUIZ #1 (SAMPLE QUESTIONS) PART 1 (NO CALCULATORS!) 1) Find the following limits without making a table. Write or -• when appropriate. If a limit does not exist, and and are inappropriate, write “DNE”. Box in your final answers. (13 points total) a) lim x x x Æ- + 2 1 (2 points) (Direct substitution works, since - 2 is in the domain of this rational function.) = - -+ = - - = 2 21 2 1 2 b) lim x xx x Æ - 3 2 81 5 3 (5 points) = - () - - Æ lim x x 3 53 3 We can cancel the x - 3 factors. =- Æ lim x x 3 5 Now, use direct substitution. 35 2

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For problems c) through e), refer to the graph of f below. Answer only is fine. c) lim x fx Æ + () 4 (1 point) =-• d) lim x Æ - 4 (1 point) =• e) lim x Æ 4 (1 point) DNE , since the answer to c), which is the right-hand "limit," and the answer to d), which is the left-hand "limit," are a mismatch. For problems f) through h), refer to the graph of f below. Answer only is fine. f) lim x Æ - 2 (1 point) = 3 g) lim x Æ 2 (1 point) DNE , since the right-hand limit is 1, which does not equal 3, the left-hand limit.
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## This note was uploaded on 09/08/2011 for the course MATH 121 taught by Professor Staff during the Spring '11 term at Mesa CC.

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Math121SampleQuiz1Sols - QUIZ#1(SAMPLE QUESTIONS PART 1(NO...

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