Intro to Dierential Equations
MATH 2070 (Winter 2011)
Name:
Exam 2
Instructions: (1) There are 100 points on the exam and an extra credit problem worth an
additional 10 points. (2) Unless indicated otherwise, show your work. No credit for correct
answers
Intro to Dierential Equations
MATH 2070 (Winter 2012)
Quiz 1
Solutions
Instructions: Unless indicated otherwise, show your work. No credit for correct answers
alone.
1. (3 points each) Given that ln 2 .7, ln 3 1.1 and ln 5 1.6, compute (or determine
that
Intro to Dierential Equations
MATH 2070 (Winter 2011)
Quiz 2 Solutions
Instructions: No technology, notes or books allowed. Unless indicated otherwise, show your
work. No credit for correct answers alone.
1. Still needs work(3 points each) Label each of t
Intro to Dierential Equations
MATH 2070 (Winter 2012)
Quiz 3 Solutions
Instructions: No technology, notes or books allowed. Unless indicated otherwise, show your
work. No credit for correct answers alone.
1. Consider the system of dierential equations
dx
Intro to Dierential Equations
MATH 2070 (Winter 2012)
Quiz 4 Solutions
Instructions: No technology, notes or books allowed. Unless indicated otherwise, show your
work. No credit for correct answers alone. Remember that the vector Y is shown in
boldface as
Intro to Dierential Equations
MATH 2070 (Winter 2012)
Exam 2 Solutions
Instructions: (1) There are 100 points on the exam and an extra credit problem worth an
additional 10 points. (2) Unless indicated otherwise, show your work. No credit for correct
answ
Intro to Dierential Equations
MATH 2070 (Winter 2011)
Exam 2 Solutions
Instructions: (1) There are 100 points on the exam and an extra credit problem worth an
additional 10 points. (2) Unless indicated otherwise, show your work. No credit for correct
answ
Intro to Dierential Equations
MATH 2070 (Winter 2011)
Name:
Exam 1
Instructions: (1) There are 100 points on the exam and an extra credit problem worth an
additional 10 points. (2) No technology or notes of any type are allowed on the exam. You
may not op
Intro to Dierential Equations
MATH 2070 (Winter 2011)
Exam 1 Solutions
Instructions: (1) There are 100 points on the exam and an extra credit problem worth an
additional 10 points. (2) No technology or notes of any type are allowed on the exam. You
may no
Intro to Dierential Equations
MATH 2070 (Winter 2012)
Exam 1 Solutions
Instructions: (1) There are 100 points on the exam and an extra credit problem worth an
additional 10 points. (2) No technology or notes of any type are allowed on the exam. You
may no
Intro to Dierential Equations
MATH 2070 (Winter 2012)
Quiz 5 Solutions
Instructions: No technology, notes or books allowed. Unless otherwise specied, no credit
for correct answers alone.
1. Let f (t) = 2 cos 5t + 2 3 sin 5t.
(a) (15 points) Write f (t) =