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Recitations

The problem sheets are designed to be worked on by students in groups in recitation. Solutions to the recitation problems are courtesy of Yu Yasufuku, the Teaching Assistant for this class.

REC # TOPICS PROBLEMS SOLUTIONS
I. First-order Differential Equations
1 Introduction

Natural Growth and Decay

Review of Logarithm
(PDF) No Solutions for R1
2 First-order Equations: Language and Examples (PDF) (PDF)
3 First-order Linear Equations (PDF) (PDF)
4 Autonomous Equations (PDF) (PDF)
5 Review (PDF)

New Topics: Complex Numbers, Complex Exponentials, Sinusoidal Functions, and How they Appear in First-order Linear Constant Coefficient Differential Equations
II. Second-order Linear Equations
6 Second-order Linear Equations: Constant Coefficient, Homogeneous (PDF) (PDF)
7 Second-order Linear Equations: Damping Conditions, Superposition, Initial Value Problems (PDF) (PDF)
8 Superposition

Exponential Response
(PDF) (PDF)
9 Operators

Superposition

Undetermined Coefficients
(PDF) (PDF)
10 Resonance

Operators
(PDF) (PDF)
11 Review
III. Short Topics
12 Step and Delta (PDF) (PDF)
13 Impulse Response = Weight Function and Convolution (PDF) (PDF)
IV. The Laplace Transform
14 Laplace Transform

Poles
(PDF) (PDF)
15 Laplace Transform and ODEs (PDF) (PDF)
16 Laplace Transform: Second-order Equations (Completing the Square)

t-shift Formula

Step and Delta Signals

Weight and Transfer

Convolution

Poles
(PDF) (PDF)
17 Laplace Transform: Meaning of the Pole Diagram

Euler's Method
(PDF) (PDF)
V. Fourier Series
18 Fourier Series (PDF) (PDF)
19 Fourier Series: Differentiating, Integrating, Shifting, Stretching

Generalized Functions
(PDF) (PDF)
20 Review
VI. First-order Systems
21 Systems of First-order Equations2A (PDF) (PDF)
22 Linear Systems (PDF) (PDF)
23 Linear Phase Portraits (PDF) (PDF)
24 Exponential Matrices (PDF) (PDF)
25 Autonomous Systems (PDF) (PDF)