Chapter 4 Binomial Explanation - Year 2

Question 1

What is binomial expansion in this topic?

Answer 1

Just the forulae in the book

Question 2

What is the 4th term in the binomial expansion?

Answer 2

n(n-1)(n-2)/3!

Question 3

When is the expansion valid for:

Answer 3

Question 4

How do you use binomial distribution to expand more complex things?

Answer 4

Break them down into simpler things

Question 5

What do you do if the x term isn’t just an x?

Answer 5

You substitute the X as the x term

Question 6

What do you do if the constant term is not 1?

Answer 6

Factor it out so that it becomes 1

Question 7

How do you determine what values of x are valid in compound expansions?

Answer 7

You choose the more restrictive one

Question 8

If a question says cubic approximation, what does it mean?

Answer 8

Find the approximation until the cubic term

Question 9

What will be the better approximation x=-1/2 or x=4

Answer 9

x=-1/2 as it is closer to 0

(You may want to state that x=4 may be outside the range of valid values