Binomial Expasion Year 1

Question 1

How can nCr also be written as?

Write it out on your iPad

Answer 1

Question 2

What must you always do when answering a binomial expansion question?

Especially when it comes to Year 1 stuff

Answer 2

You should always read the power!!!

Question 3

How would you go about answering a question like this?

Answer 3

• You would set 1+x/4 = 1.025
• Then you would solve for x
• Then you would sub in the value you get into the binomial expansion (that you probably did prior)

Question 4

In what scenario do you do Year 1 bionomial?

Answer 4

In the scenario where (a+b)^n

Question 5

In what scenario do you do Year 2 bionomial?

Answer 5

If n is a fraction or a negative number in the formula (a+b)^n

Question 6

How do you find the range of values for which an expansion is valid?

Answer 6

Don’t forget to switch the signs if the coefficient of x is a negative!