x Turn on thread page Beta
 You are Here: Home >< Maths

# Edexcel A2 D2 Mathematics June 2016 - Official Thread watch

1. (Original post by Bekah22)
With DP, would you get penalised for doing your states the opposite way round to the mark scheme? -for example, if the context is number of machines in storage already, is it ok to do it in the order 0 then 1 then 2 or should it be 2 then 1 then 0 (as the eg in the mark scheme shows). Or is there a rule on the order states should be done in?
thats fine
2. For activity networks, when doing flow-augmenting routes, are you allowed to do a forward flow and back flow down the same arc or is this not allowed? Tried it on a paper just now and it didn't work out.
3. Anyone got any hints on how to start dyanmic programmings?
4. (Original post by Asurat)
For activity networks, when doing flow-augmenting routes, are you allowed to do a forward flow and back flow down the same arc or is this not allowed? Tried it on a paper just now and it didn't work out.
i dont understand what you mean by doing a forward flow and a back flow
5. (Original post by KloppOClock)
well seen as that question is from an actual exam paper... yes
What would we do if there were 4 products instead of me, would the middle bit of the production table be the same structure? Thanks!
6. (Original post by ReeceFraser)
Anyone got any hints on how to start dyanmic programmings?
look at the question and determine the following things

what should my destination be (commonly zero)
how high can my action be
how high can my state be.

also write what each column means, next to state for example, write how many units you have at the start
7. (Original post by KloppOClock)
i dont understand what you mean by doing a forward flow and a back flow
E.g if there is an arc DF.
One flow augmenting route has a flow in the -> direction.
Another flow augmenting route on the same network has a flow in the <- direction (opposite). So one of them is a backflow.

I'm wondering if you can do this, or if you have to stick to one direction once you start flow augmenting.
8. (Original post by economicss)
What would we do if there were 4 products instead of me, would the middle bit of the production table be the same structure? Thanks!
if there were 4 products, your second and third stage should be similar
9. (Original post by Asurat)
E.g if there is an arc DF.
One flow augmenting route has a flow in the -> direction.
Another flow augmenting route on the same network has a flow in the <- direction (opposite). So one of them is a backflow.

I'm wondering if you can do this, or if you have to stick to one direction once you start flow augmenting.
yh as long as they are separate flow augmenting routes
10. (Original post by KloppOClock)
yh as long as they are separate flow augmenting routes
Thanks, you feeling good for tomorrow?
11. (Original post by Asurat)
Thanks, you feeling good for tomorrow?
nervous, failed my fp1, got 100ums in m1, so basically my entire grade depends on this exam
12. (Original post by KloppOClock)
nervous, failed my fp1, got 100ums in m1, so basically my entire grade depends on this exam
If you got 100 I think you should be able to pull it back nicely. Good luck bud
13. (Original post by Asurat)
If you got 100 I think you should be able to pull it back nicely. Good luck bud
you too!
14. (Original post by ReeceFraser)
Anyone got any hints on how to start dyanmic programmings?
If you're given a network it's normally straightforward. I don't know if this is too helpful but:
Otherwise Stage is normally either

Option 1
Spoiler:
Show
Stage- The product to be considered
State- The number of units available to be allocated
Action- Number of units allocated
Destination- Number of units remaining

Option 2
Spoiler:
Show
Stage-Month/year Starting from the last month
State- Number of units in storage
Action- Number of units allocated
Destination- Number of units remaining
15. (Original post by KloppOClock)
nervous, failed my fp1, got 100ums in m1, so basically my entire grade depends on this exam
We're on the same page hahah, you resitting fp1?
16. (Original post by KloppOClock)
nervous, failed my fp1, got 100ums in m1, so basically my entire grade depends on this exam
Lol.
Have you done past papers? I hardly have
17. Lol learnt Ch 1 and simplex tableu so far.
What normally carries the most marks in the exam?

Posted from TSR Mobile
18. In the June 2012 paper q3, in the second stepping stone method are there mutiple answers?
19. (Original post by physicsmaths)
Lol learnt Ch 1 and simplex tableu so far.
What normally carries the most marks in the exam?

Posted from TSR Mobile
Dynamic programming
20. (Original post by physicsmaths)
Lol learnt Ch 1 and simplex tableu so far.
What normally carries the most marks in the exam?

Posted from TSR Mobile
Dynamic programming usually has the most marks.

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: August 14, 2016
Today on TSR

### How do I turn down a guy in a club?

What should I do?

### My dad said he's stalked me at uni!

Poll
Useful resources

Can you help? Study help unanswered threadsStudy Help rules and posting guidelinesLaTex guide for writing equations on TSR

## 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