You are Here: Home >< A-levels

# OCR C1 13th May 2015 *official thread* watch

1. Didn't see one out there so i decided to make a thread for tomorrows 13/05/2015 core 1 exam
2. For some reason I just can't do binomial expansion, any tips?
3. (Original post by danthick)
For some reason I just can't do binomial expansion, any tips?
That's in C2 if you're sitting with the ocr exam board
this is the way i do binomial expansion
e.g expand (2x+5)^4
1((2x)^4 x 5^0) + 4((2x)^3 x 5^1) + 6((2x)^2 x 5^2) + 4((2x)^1 x 5^3) + 1((2x)^0 x 5^4) (and then simplify)
- do the first term to the power of whatever the power is and the second term to the power of 0
- decrease the value of the first term power by one whilst increasing the value of the power of the second term
- the powers should always add up to the original power, in this case 4
- the numbers at the front you get by pressing the nCr button on a calculator e.g to get the first number you do 4C0, which is one (4C1, 4C2, 4C3, 4C4)

i think i may of just confused you even more but i hope this helps
4. (Original post by Dentist214)
That's in C2 if you're sitting with the ocr exam board
this is the way i do binomial expansion
e.g expand (2x+5)^4
1((2x)^4 x 5^0) + 4((2x)^3 x 5^1) + 6((2x)^2 x 5^2) + 4((2x)^1 x 5^3) + 1((2x)^0 x 5^4) (and then simplify)
- do the first term to the power of whatever the power is and the second term to the power of 0
- decrease the value of the first term power by one whilst increasing the value of the power of the second term
- the powers should always add up to the original power, in this case 4
- the numbers at the front you get by pressing the nCr button on a calculator e.g to get the first number you do 4C0, which is one (4C1, 4C2, 4C3, 4C4)

i think i may of just confused you even more but i hope this helps
I'm doing OCR MEI Core 1, which has binomial expansion. This helped a lot actually, thank you very much!

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 13, 2015
Today on TSR

### Edexcel C3 Maths Unofficial Markscheme

Find out how you've done here

### 1,410

students online now

Exam discussions

Poll

## All the essentials

### Student life: what to expect

What it's really like going to uni

### Essay expert

Learn to write like a pro with our ultimate essay guide.

### Create a study plan

Get your head around what you need to do and when with the study planner tool.

### Resources by subject

Everything from mind maps to class notes.

### Study tips from A* students

Students who got top grades in their A-levels share their secrets