You are Here: Home >< Maths

# C2 binomial expansion Watch

1. Q 8 ii

a= -3/2
n =16

For the second part, you work out x = 0.001 and then plug it into the initial equation but surely that's not a good estimate since you're only using three terms?

Mark scheme

2. (Original post by eggfriedrice)
Q 8 ii

a= -3/2
n =16

For the second part, you work out x = 0.001 and then plug it into the initial equation but surely that's not a good estimate since you're only using three terms?

Mark scheme

Notice that the question says 'for small values of x', i.e values that are close to zero.

Notice that, if

then

as

So it's not a bad estimate despite the fact that you're only using 3 terms (the values of x must be really small!)

Does that help?
3. (Original post by Indeterminate)
Notice that the question says 'for small values of x', i.e values that are close to zero.

Notice that, if

then

as

So it's not a bad estimate despite the fact that you're only using 3 terms (the values of x must be really small!)

Does that help?
I half understand it haha but it's better than not understanding it at all, thanks. C:

TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Updated: May 17, 2013
Today on TSR

### Falling in love with him

But we haven't even met!

### Top study tips for over the Christmas holidays

Discussions on TSR

• Latest
• ## See more of what you like on The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

• Poll
Useful resources

### Maths Forum posting guidelines

Not sure where to post? Read the updated guidelines here

### How to use LaTex

Writing equations the easy way

### Study habits of A* students

Top tips from students who have already aced their exams

## Groups associated with this forum:

View associated groups
Discussions on TSR

• Latest
• ## See more of what you like on The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

• The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.