Math 1441 Practice Final: Limits, Derivatives, Differentials, and Integrals, Exams of Calculus

The practice final exam for math 1441, a college-level mathematics course focusing on limits, derivatives, differentials, and integrals. The exam includes problems on finding limits, computing derivatives, using differentials to estimate area changes, applying newton's method, determining the domains and intervals of increase/decrease/concavity, and computing definite integrals. Students are required to show their work and box their answers.

Typology: Exams

Pre 2010

Uploaded on 02/24/2010

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Math 1441 Practice Final Name
F. Ziegler Fall 2005
Show your work to receive credit, and box your final answer in every computation.
1. Find the limits:
(a) lim
x2
x2
2x
x2x2
(b) lim
x0+ xr1 + 2
x+1
x2
2. Compute the derivatives of the following functions:
(a) f(x) = 2
x1/2+3
x1/3+4
x1/4
(b) g(x) = x
cos x
(c) h(x) = sin(xcos x)
pf3
pf4
pf5

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Math 1441 Practice Final Name F. Ziegler Fall 2005

Show your work to receive credit, and box your final answer in every computation.

  1. Find the limits:

(a) lim x→ 2

x^2 − 2 x x^2 − x − 2

(b) lim x→0+

x

x

x^2

  1. Compute the derivatives of the following functions:

(a) f (x) =

x^1 /^2

x^1 /^3

x^1 /^4

(b) g(x) =

x cos x

(c) h(x) = sin(x cos x)

  1. Use differentials to estimate the relative increase of a sphere’s area, when its volume increases by 3%.
  2. (a) Given an approximation xn to a root of the equation x^5 + x − 1 = 0, state the formula for its next approximation xn+1 in Newton’s method.

(b) Deduce the value of a root correct to six decimal places.

(c) Is there any other root than the one you found in (b)? Cite the theorem that justifies your answer.

(d) Find the global min and max of x^5 + x − 1 for x in the interval [1, 2].

  1. Find the general indefinite integrals:

(a)

x +

x

dx

(b)

x^3

x^4 + 1 dx

(c)

x^7

x^4 + 1 dx

  1. Compute the definite integrals:

(a)

∫ (^) π/ 2

0

sin 2t sin t

dt

(b)

∫ (^) π/ 2

0

cos t sin(sin t) dt

(c)

∫ (^) π/ 2

0

(2 sin t − 2 sin^2 t) dt [Hint: 2 sin^2 t = 1 − cos 2t.]

2

2

! 1 ! 1

1

! 2

! 2

1

  1. [Note: (a,b,c,d) are independent and can be done in any order.]

A strophoid has equation y^2 = x^2

1 − x 1 + x

(a) Use implicit differentiation to find an equation of its tangent line at the point with coordinates (x, y) = (^12 ,

√ 3 6 ).

(b) Set up the integral for the area of its loop. Then show that the substitution x = sin t reduces it to one of the integrals of problem 7. [Hint: dx =

1 − sin^2 t dt.]