Math 217 Homework Problems Spring 2014 Dr. Steve Krantz
First Homework Assignment
Section 1.2, 1be, 2cf, 4
Section 1.3, 1bg, 2cef
Section 1.4, 1bdg, 2de, 7
This homework assignment is due Wednesday, January 29 in class.
Second Homework Assignment
Section
"WW rzeem war
'0 M£l0$
Math 217 Kmntz
May 2nd, 2014
Final Exam
General Instructions: Read each problem carefully. Do only
what is requestednothing more nor lees Always Show your work
on each. problem  unless the problem explici
Math 217
Page 1 Exam 1
Name:
ID:
Section:
This exam has 16 questions:
0 14 multiple choice questions worth 5 points each.
0 2 hand graded questions worth 15 points each.
Import ant:
o No graphing calculators! Any nongraphing scientic calculator is n
Math 217: Dierential Equations
Lecture Notes: Substitution Methods  Homogeneous
FirstOrder DEs and Bernoulli Equations
Mark Pedigo
1
Substitution Methods
Substitution Method I: Homogeneous Equations
A homogeneous rstorder DE is one that can be written
Math 217: Dierential Equations
Lecture Notes: 1.6 Substitution Methods: Reducing
SecondOrder DEs to FirstOrder
Mark Pedigo
1
Substitution Methods
A secondorder DE involves the second derivative of y(x), an thus has the form
F (x, y, y , y ) = 0
(1)
If
Differential Equations (Math 217) Midterm 1
September 20, 2016
No calculators, notes, or other resources are allowed.
There are 14 multiplechoice questions, worth 5 points each, and two handgraded
questions, worth 15 points each, for a total of 100 po
Differential Equations (Math 217) Midterm 1
September 20, 2016
No calculators, notes, or other resources are allowed.
There are 14 multiplechoice questions, worth 5 points each, and two handgraded
questions, worth 15 points each, for a total of 100 po
Differential Equations (Math 217) Practice Midterm 1
September 20, 2016
No calculators, notes, or other resources are allowed.
There are 14 multiplechoice questions, worth 5 points each, and two handgraded
questions, worth 15 points each, for a total
Differential Equations Homework 1
Due September 9
Instructions
1. Write down the names of the people you worked with.
2. Write down any resources you used other than ones that most of your classmates would be
familiar with, such as Wikipedia or Wolfram Al
Differential Equations Homework 4
Due September 23
Instructions
1. Write down the names of the people you worked with.
2. Write down any resources you used other than ones that most of your classmates would be
familiar with, such as Wikipedia or Wolfram A
Differential Equations Homework 2
Due September 9
Instructions
1. Write down the names of the people you worked with.
2. Write down any resources you used other than ones that most of your classmates would be
familiar with, such as Wikipedia or Wolfram Al
Differential Equations (Math 217) Practice Midterm 1
September 20, 2016
No calculators, notes, or other resources are allowed.
There are 14 multiplechoice questions, worth 5 points each, and two handgraded
questions, worth 15 points each, for a total
Differential Equations Homework 3
Due September 16
Instructions
1. Write down the names of the people you worked with.
2. Write down any resources you used other than ones that most of your classmates would be
familiar with, such as Wikipedia or Wolfram A
1.
(10 points)
SOLUTIOng
Krantz
Math 217
March 5, 2014
Second Midterm
General Instructions: Read each problem carefully. Do only
What is requestedmothng more nor less. Always show your work
on each problemunless the problem explicitly tells you not
Math 217: Dierential Equations
Mark Pedigo
1
Linear SecondOrder DEs
A secondorder DE in y is of the form
G(x, y, y , y ) = 0.
This DE is said to be linear provided G is linear in the dependent variable y and its derivatives
y and y ; i.e., is of the for
w
!/455.4
X
7
'
.
U9'11
V
V
3*
.
H.
JAM:
'
_
I
A
,
W
(W:
1
c~LQ.4._e_7.~._(1:F1
1L;L!?s ?:@i4~9'~aw
.
(
3;
.,/\.):9=~.re.

49*
M
,
xi
V?
'3;
Q, J. C .5
C?!
"Q"
:
m.we*"
A=~a
Mm:
ww~a~$%
I '1*
%
Lf\."mj
.=Lf5.3~[,]
:44
r
ff
LC
=:~
3&3
'
2.
1%?
.
!3_