Differential Equations

Math 23 Summer 2026

Homework

Homework is due each Wednesday before midnight (East coast time). We will be using webwork which is available through your canvas website. As all homework is posted well in advance, no late homework will be accepted. The lowest score will be dropped.

Below are some suggested book problems that will help you to prepare for exams. They are not to be turned in, but will be useful in ensuring that you are following the material.

Week Suggested Book Problems
Week 2 §1.1: #11-17
§1.2: #4, 12
§1.3: #4, 9, 18, 21
§2.1: #11, 21, 25
§2.2: #5, 13,23, 25
§2.4: #4, 8, 11, 17, 20, 23
Week 3 §2.5: # 14, 15, 22
§2.6: #2, 14, 16, 24, 27
Week 4 §3.1: # 16, 18, 21
§3.2: # 4, 8, 12, 22, 28
§3.3: # 5, 11, 20, 26, 35
Week 5 §3.4: # 6, 12, 14, 28, 29
§3.5: # 9, 13, 18, 29
§3.6: # 11, 15
§7.1: # 7,13, 15
§7.3: # 11, 24
§7.4: # 2 (only (a), (b), (c)), 5, 6 (only (a), (b))
Week 6 §7.5: # 8, 18, 23
§7.6: # 10, 11, 24
§7.8: # 8, 15, 18 (only (a), (b), (c), (d)
Week 7 §7.9: # 2, 4, 12, 14
§9.1: # 13, 17, 18
Week 8 §9.2: # 4, 8
§9.3: # 4, 9, 20
§9.4: # 3, 8
§9.5: # 4, 12

Plotting slope fields and trajectories
Direction field plotter
Week 9 §6.1 # 2, 14
§6.2 # 16, 26
§6.3 # 18, 20, 25 §6.4 # 8, 15
§6.5 # 8, 14, 16
§6.6 # 1, 2, 16, 17