## Homework:

The best advice I can give to any math student is to solve problems: doing the assigned homework is the best way to learn the material. Put another way: the homework is the most important part of the course. I would encourage you to work with other students in the class. You will learn the material faster and understand it better by discussing it with your peers.

Every homework is due the class after it is assigned.

HW Week Class Assignment Solutions
1 Week 1 Mon / Tue 9.1: 8, 14, 16, 28, 36 Solutions
2 Week 1 Wed / Thu 9.2: 18, 26;  9.3: 28, 34, 42 Solutions
3 Week 1 Fri / Thu 9.4: 6, 14, 20, 22, 26 Solutions
4 Week 2 Mon / Tue 9.5: 14, 26, Three More Problems Solutions and Three More Problems Solutions
5 Week 2 Wed / Thu 9.6: 2, 4, 8, 12, 14 Solutions
6 Week 2 Fri / Thu 9.6: 22, 24, 26, 32, 34 Solutions
7 Week 3 Tue / Wed 10.1: 17-22, 34, 38; 10.2: 20, 28 Solutions
8 Week 3 Fri / Thu 10.3: 2, 12, 40; 10.4: 22; One More Problem Solutions and One More Problem Solution
9 Week 4 Mon / Tue 9.7: 32, 36; Three More Problems Solutions and Three More Problems Solutions
10 Week 4 Wed / Thu 10.5: 4, 11-16, 20, 22, 32(a) Solutions
11 Week 4 Fri / Thu 11.1: 31-36; 11.2: 10, 32, 34; Plus one more Solutions and Plus One More Problem Solutions
12 Week 5 Mon / Tue 11.3: 62, 74, 82; Two Extra Problems Solutions and Two Extra Problems Solutions
13 Week 5 Fri / Thu 11.4: 4, 14*, 26**, 36, 38 (See notes, below) Solutions
14 Week 6 Mon / Tue 11.5: 2, 20, 28, 34, 36 Solutions
15 Week 6 Wed / Thu 11.6: 34, 38, 42, 44, 46 Solutions
16 Week 6 Fri / Thu 11.6: 10, 16, 26, 28, 30 Solutions
17 Week 7 Mon / Tue 11.7: 4, 8, 10, 46, 48 Solutions
18 Week 7 Wed / Thu 11.8: 10, 12, 16, 24, 38 Solutions
19 Week 7 Fri / Thu 11.7: 30; 11.8: 2, 18, 40(b); Another Problem Solutions
20 Week 8 Mon / Tue 12.1: 6, 10;  12.2: 16, 22, 32 Solutions
21 Week 8 Wed / Thu 12.3: 20, 30, 40, 44, 46 Solutions
22 Week 8 Fri / Thu 12.4: 8, 18, 24, 26; A Classic Problem Solutions
23 Week 9 Wed / Thu 12.5: 10;  12.6: 8, 10, 24, 28 Solutions
24 Week 9 Fri / Thu 12.7: 8, 12, 20, 32, 38 Solutions
25 Week 10 Mon / Tue 12.8: 4, 16, 28, 30(a), 34 Solutions
26 Week 10 Wed / Thu 13.1: 15–18, 29–32; 13.2: 16, 24(a), 34 Solutions
27 Week 10 Fri / Thu 13.3: 8, 16, 20, 26, 29–32 Solutions
28 Week 11 Mon / Tue 13.4: 4, 12, 14, 16, 20* (graph optional) Solutions
29 Week 11 Wed / Thu 13.5: 4, 10, 14, 18, 30 Solutions
30 Week 11 Fri / Thu 13.6: 20, 24, 34, 38; One More Problem Solutions
31 Week 12 Mon / Tue 13.7: 4, 10, 14, 16, 18 Solutions
32 Week 12 Wed / Thu 13.8: 8, 14, 18;  13 Review: 32, 34 Solutions

### Notes

* Graph Optional
** Use linear approximation, not differentials

## Homework Rules:

• Homework is due at the beginning of class.
• No late homework will be accepted. In return, we will drop the lowest 3 homework scores. Please reserve these three "wild cards" for emergencies.
• Students in the Tuesday-Thursday section will turn in two homeworks on Tuesday and one on Thursday.
• We do not accept electronic homework submissions. If you do the homework with a word processor like LaTeX or Word, please print it out and submit the paper copy.
• If you cannot turn in your homework because of a religious holiday like Yom Kippur, please either turn it in early or give it to a friend to turn it in.

These can be summarized by: Please make things as easy as possible for the grader.

• Please write legibly and indicate clearly where a new problem starts.
• Try to keep the problems in order.
• Use words to explain your work, if necessary. Show your work. Answers without explanations are given zero points.
• If you are unable to finish a problem, indicate where you got stuck. This will help us to give you partial credit.
• Collaborations are encouraged, however you should acknowledge your collaborators by name on your homework. Of course you must turn in your own homework in your own words.
• Similarly, you should acknowledge the use of Mathematica or similar software. If you use Mathematica, nevertheless, write down all steps of your computation or print out the Mathematica notebook, you authored.

#### Homework And The Math 21a Community:

• Please let us know about typos and misprints. We will post corrections on this page and try to make announcements in class when possible.
• Solutions will be posted here once the homework is collected.
• Homework scores from individual sections will be adjusted at the end of the semester, since each section has their own grader.