## Notes Information

Login / Sign Up to View Document

## Sample Document Text

MATH 221, Weigang Zhong Test 1(Sample) 30 June 2006
Directions: SHOW ALL WORK! - answer the questions in the space provided on the
question sheet, use the other side of the page if necessary. You may NOT use your calculator
in your work. Perfect score: 100 points.
The University of Maryland Honor Pledge reads:
"I pledge on my honor that I have not given or received any
unauthorized assistance on this examination."
Please write the exact wording of the Pledge, followed by your signature, in the space below:
Pledge:
Signature:
Name:
1. (5 points) Which, if any, of the functions t, 2t, 3t are solutions of the differential equa-
tion yprimeprime ? 2yprime + 2y = 4t ? 4?
2. (10 points) Solve the initial value problem yprime = ty + t, y(0) = 2, by separation of
variables.
3. (10 points) Solve the initial value problem yprime = (1 ? y)cosy, by integrating factor.
4. (13 points) Find the sum of the given infinite series if it is convergent.
(a) (6 points) 5
2
6 +
53
62 +
54
63 +
55
64 +
56
...

## Related Documents

Unauthorized Exam

Corresponding Array Exam

Unauthorized Exam

Unauthorized Exam

Online Shopping Exam

Unauthorized Exam

Programming Problem Exam

Unauthorized Exam

Unauthorized Exam

Unauthorized Exam

Unauthorized Exam

Unauthorized Exam

Unauthorized Exam

Unauthorized Exam

Unauthorized Exam

Unauthorized Exam

© Copyright 2020 , Koofers, Inc. All rights reserved.

The information provided on this site is protected by U.S. and International copyright law, and other applicable intellectual property laws, including laws covering data access and data compilations. This information is provided exclusively for the personal and academic use of students, instructors and other university personnel. Use of this information for any commercial purpose, or by any commercial entity, is expressly prohibited. This information may not, under any circumstances, be copied, modified, reused, or incorporated into any derivative works or compilations, without the prior written approval of Koofers, Inc.