\( \color{red} {\text{ The course is over.} } \)

Please provide feedback. Thanks!

Let's get started. Work your way down this list of tasks. Remember to check back during the week, as tasks may get added:

Friday:

In addition to Wednesday's list,

A. Read Useful Lemma to learn about it. What other questions can we apply it to?

B. It seems to me that people are not too familiar with what roots of unity are, and how to use them. This is a advanced topic, that pushes your understanding of polynomials. Try working on the following questions from the book, with a focus on using roots of unity (somewhere) in the solution. If you can't solve them after Sunday, make a post on Help Wanted.

C. Write a comment in What I Learnt. I'm sure a lot of you have learnt from this past week, but there are only 2 comments there.

\[ 18, 28, 37, 38 \]

Wednesday:

In addition to Monday's list,

A. The discussions on Polynomial Vieta and Polynomial Remainder have been opened. Join in, and share what you learnt.

B. For those who haven't seen Vieta's Formula, read the attached note. Solve the 2 questions added at the end (and struggle with the third).

C. Work on Sharky's problem Vieta might come in handy.

D. Work on Eddie's note on Having No Rational Roots.

E. Write a comment in What I Learnt.

Monday:

A. Read through pages 245 - 250 of Problem Solving Strategies. (Not the whole chapter)

B. If you have any questions about the material, ask them in Help Wanted.

C. Know the following terms:

- Polynomials, Coefficients, Degrees

- Division, Quotient, Division Algorithm

- Remainder Factor Theorem, Rational Root Theorem

- Vieta's Formula

- Roots of unity

D. Work on the following problems in the book, listed on pages 254-255. Try not to refer to solutions at the end of the chapter.

\[ 3, 4, 5, 11, 13, 16, 17, 18. \]

E. Work on the problems Polynomial Vieta and Polynomial Remainder. Solutions / Discussions will only be open in 2 days, so everyone can work on them.

F. Write a comment in What I Learnt.

G. Provide feedback, so that we can improve this experience for you.

The goal of this set is to provide exposure to problems which you likely have not encountered in school. You will learn new techniques, apply known ideas, and improve your problem solving skills. For those who are new, you can review How This Will Work to understand the expectations.

## Comments

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TopNewestFor roots of unity practice you might want to try my problem – David Lee · 2 years, 6 months ago

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Where can I get the book ? Do I need to purchase a hard copy of book or is it a pdf available for free ? – Aman Sharma · 1 year, 5 months ago

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– Calvin Lin Staff · 1 year, 5 months ago

You can try looking for pdf copies of it online.Log in to reply

– Aman Sharma · 1 year, 5 months ago

Sir, can you please tell me the name of the book ?Log in to reply

Why has there been so little activity? Is it because it's been a while since the last update (June 27)? Or is it because everyone is celebrating July 4? – Colin Tang · 2 years, 6 months ago

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– Colin Tang · 2 years, 6 months ago

When can we expect another update? Or is there something that I'm missing?Log in to reply

I would appreciate feedback, thanks! – Calvin Lin Staff · 2 years, 6 months ago

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– Colin Tang · 2 years, 6 months ago

When is the next course starting?Log in to reply

What's root of unity – Daniel Lim · 2 years, 6 months ago

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Help Wanted. There is an active discussion initiated by @Ananay Agarwal about root of unity. – Calvin Lin Staff · 2 years, 6 months ago

Refer toLog in to reply

– Daniel Lim · 2 years, 6 months ago

okLog in to reply

Are we expected to purchase a copy of the book? Or is there someway to view it for free? – Chris Quinones · 2 years, 6 months ago

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Mathematics/MSchSchool-level/Engel%20A.%20Problem-solving%20strategies%20(for%20math%20olympiads)(Springer,%201998)(ISBN%200387982191)(O)(415s)MSch.pdfFor free. Hopefully it's virus-free as well. – Colin Tang · 2 years, 6 months ago

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– Colin Tang · 2 years, 6 months ago

Google "arthur engel problem solving strategies" and follow the first link, which should be a pdf. By the way the above link works if you surround italicized text with "_"s.Log in to reply

– Chris Quinones · 2 years, 6 months ago

thank youLog in to reply

Great work! (y) – Ayush Gupta · 2 years, 6 months ago

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which book should i read? – Johan Setiawan · 2 years, 6 months ago

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– Calvin Lin Staff · 2 years, 6 months ago

I've updated it with a link to the book that we're using. Thanks!Log in to reply

– Aman Sharma · 1 year, 5 months ago

Where is the link sir ?Log in to reply

Hello! I actually feel that apart from referring to the book as a resource, some notes may be added to facilitate better understanding of certain topics that may be covered in the future. Eg- Functional eqaution may be covered, but for a beginner it will be very difficult to understand without proper directive. Thnx! :) – Krishna Ar · 2 years, 6 months ago

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