Derivative to Compute - Multivariable - Exam, Exams of Calculus

main points of this exam paper are: Derivative to Compute, Function, Substituting Specific, Values, Rule, Interval, Increasing, Concave Down, Decreasing, Interval

Typology: Exams

2012/2013

Uploaded on 03/21/2013

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Name:
Mathematics 105
Sections A, B, C, and D
Final Exam
Dec 15, 2009
Problem Possible Actual
1 10
2 20
3 10
4 20
5 10
6 15
7 24
8 15
9 20
10 20
11 18
12 18
Total 200
You must show all work to receive credit.
No electronic devices other than calculators are permitted.
Give exact answers (such as ln5 or e2) unless requested otherwise.
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Name:

Mathematics 105 Sections A, B, C, and D Final Exam Dec 15, 2009

Problem Possible Actual 1 10 2 20 3 10 4 20 5 10 6 15 7 24 8 15 9 20 10 20 11 18 12 18 Total 200

You must show all work to receive credit. No electronic devices other than calculators are permitted. Give exact answers (such as ln 5 or e^2 ) unless requested otherwise.

  1. Suppose that the function f has the rule

f (x) =

− 1 x < 0 0 0 ≤ x < 2 1 2 ≤ x

Prove that f is not an even function by substituting specific values for x.

  1. Suppose that f ′(x) = x^2 − 4.

(a) On what interval is f ′^ increasing?

(b) On what interval is f concave down?

(c) On what interval is f decreasing?

(d) On what interval is f ′′^ increasing?

(e) On what interval is f ′^ concave down?

  1. If f (x) = 2 + 3x + x^4 , give the equation of the tangent line to the derivative of f at the point (1, f ′(1)).
  2. Evaluate the following limits. If the limit exists explain how you evaluated it. If the limit does not exist be sure to justify this answer.

(a) lim x→ 0

2 − 2 cos x − x^2 x^4

(b) lim x→∞

sin x x

(c) lim x→ 0

x^3 − 1 7 − 7 x

  1. Find

dy dx

for the following expressions.

(a) y = 3x^ cos 5x

(b) y^4 + x^4 = 4x^2 y^2

(c) y = ex

(^2) sin x

(d) y =

∫ (^) x 2

6

arctan (ln t) dt

  1. Two boats start sailing from the same point, one heading north and the other west. When the boat heading west is 300 miles from the origin, she is moving 20 miles per hour. At the exact same time the other boat is 400 miles from the origin and is moving 10 miles per hour. At this moment, how fast are the two boats moving away from each other?
  1. A problem from Eric Towne’s review stated,“Your company is mass-producing a cylindrical container. The flat portion (top and bottom) costs 3 cents per square inch and the curved (lateral) portion costs 5 cents per square inch. If your budget is $9.00 per container, what dimensions will give the largest volume?

area of circle = πr^2 lateral area of cylinder = 2πrh volume of cylinder = πr^2 h”

(a) Draw a picture of what this problem describes, labeling any variables that you use.

(b) Write the constraint equation.

(c) Write the objective function.