You are Here: Home >< Maths

# Who is ready for C1 tomorrow watch

1. (Original post by rexasarus)
Does everyone know the Sn proof??
Our teacher said it's likely to come up...
Sn= a + (a+d) +... + (a+(n-2)d) + (a+(n-1)d)
Reverse: Sn = (a+(n-1)d) + (a+(n-2)d)...+(a+d) + a
Add: 2Sn = (2a+(n-1)d) + (2a+(n-1)d) ... +(2a+(n-1)d)
2Sn= n(2a+(n-1)d)
Sn=n/2(2a+(n-1)d)
2. I have done 3 papers today and I have got 59 on 2 of them and 62 on the other. It sucks because I keep losing silly marks because of lazy errors like forgetting to times something or the other. Hopefully I will feel better in the exam because I will have plenty of time to check my work.
3. You're given the series formulae in the formula book. Don't panic!
4. If I get an A in core 1 and a B in core 2 and mechanics, would I be able to come out with an A overall?
5. (Original post by CharlieeB)
If I get an A in core 1 and a B in core 2 and mechanics, would I be able to come out with an A overall?
Providing you get the minimum UMS for a B of 70. Then you would need to get full UMS in Core 1.
6. I ALWAYS FORGET TO PLUS C
ALWAYS!!!!!!!!!!!!!!!!

Posted from TSR Mobile
7. Would two A's and a D make a B overall? (Stats is a pain)

Posted from TSR Mobile
Would two A's and a D make a B overall? (Stats is a pain)

Posted from TSR Mobile
Well say the ums was 80+80+50 that would be 210 which is a B

Posted from TSR Mobile

### 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

### Edexcel C4 Maths Unofficial Markscheme

Find out how you've done here

### 1,753

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