You are Here: Home >< Maths

# FP1 Proof by divisibilitiy watch

1. (Original post by Jai Sandhu)
I think it would be sketchy, STEP allows any innovative idea so you will be set for that
it's not really innovative. It's that sometimes they ask you a problem and teach you an unorthodox method to solve it, when really it can be solved using standard methods

this is especially true in the sort of algebra inequalities you need to prove in statistics I think
2. Sorry that I have written it out in here but her is how I did it.

f(k+1)-4f(k)= (4^(k+1)+6k+14)-4(4^(k)+6k+8)
=(4^(k+1)+6k+14) -(4^(k+1)+24k+32)
=-18k-18
=18(-k-1) which is divisable by 18

Good luck in your FP1 tomorrow I am hoping to get an A!
3. (Original post by Damien_Dalgaard)
You legend
4. (Original post by Jai Sandhu)
4n
+ 6n + 8

I think you can do the rest?
Thank you, I think it is 22 there instead, I owe you one.

(Original post by Patrick2810)
Didn't you already get A in further maths?
want to hopefully max out on the ums + fp2 involves some fp1.
5. (Original post by alexneuty)
Sorry that I have written it out in here but her is how I did it.

f(k+1)-4f(k)= (4^(k+1)+6k+14)-4(4^(k)+6k+8)
=(4^(k+1)+6k+14) -(4^(k+1)+24k+32)
=-18k-18
=18(-k-1) which is divisable by 18

Good luck in your FP1 tomorrow I am hoping to get an A!
Thank you, it needed use of f(k) I see.

Kind Regards, same to you

Will rep you when it comes back

### Related university courses

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

### AQA Mechanics Unofficial Markscheme

Find out how you've done here

### 2,652

students online now

Exam discussions

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

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