Question

The prof mentioned abt a material where in its appendix there's a section regarding binomial expansion. It was in session 2's last clip. Any idea what material he talked about?

Answer 1

*maybe* this
http://ocw.mit.edu/courses/mathematics/18-01sc-single-variable-calculus-fall-2010/1.-differentiation/part-a-definition-and-basic-rules/session-2-examples-of-derivatives/MIT18_10SCF10_Ses2d.pdf

though it's not very informative.

However, you can look at
http://www.khanacademy.org/math/algebra2/polynomial_and_rational/binomial_theorem/v/binomial-theorem

and
https://en.wikipedia.org/wiki/Binomial_theorem

Answer 2

Yes, if you want to learn more about the binomial theorem you'll have to rely on other resources such as those mentioned by phi. This is one of the few places in this course where Prof. Jerison refers to something that isn't included in the online materials. Students in that class were using the second edition of Calculus with Analytic Geometry by George F. Simmons, which explains the binomial theorem in an appendix, and that's what he's talking about. Be aware that although the binomial theorem is interesting and potentially useful, you don't actually need it to follow the argument he's making here. More generally, while the Simmons book is excellent and recommended if you want a text and can afford it, they've done a good job of structuring this course so that you don't need a text.