# D1 and D2 Edexcel

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Thread starter 6 years ago
#1
For anyone that has completed Edexcel D2 - is there any knowledge besides matchings, prim's algorithm, and Kruslals algorithm required from D1?
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6 years ago
#2
Linear programming, possibly more.
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Thread starter 6 years ago
#3
(Original post by Liamnut)
Linear programming, possibly more.
Are you sure? D2 apparently does not use the graphical method to solve linear programming problems such as D1 hence why is it needed?
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Thread starter 6 years ago
#4
Looking for someone who is actually sure of any further pre requisites (in addition to ones posted in my first post).
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6 years ago
#5
(Original post by Inevitable)
Looking for someone who is actually sure of any further pre requisites (in addition to ones posted in my first post).
I'm sure linear programming is a prerequisite.

(Original post by Inevitable)
Are you sure? D2 apparently does not use the graphical method to solve linear programming problems such as D1 hence why is it needed?
If you are that desperate to know, a quick look at the d2 textbook (you can preview it in Amazon) or a peak of the syllabus (easily found on Google) will reveal your answers.

You still need D1 knowledge, for example formulating the problems. Since there're now three variables involved, solving graphically is very difficult so the simplex algorithm is used, to do this you introduce slack variables, which requires an inequality, that is formed with d1 knowledge.
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Thread starter 6 years ago
#6
(Original post by Liamnut)
If you are that desperate to know, a quick look at the d2 textbook (you can preview it in Amazon) or a peak of the syllabus (easily found on Google) will reveal your answers.

You still need D1 knowledge, for example formulating the problems. Since there're now three variables involved, solving graphically is very difficult so the simplex algorithm is used, to do this you introduce slack variables, which requires an inequality, that is formed with d1 knowledge.
That wasn't meant to be a slur on you.

I have gone through the specification already (albeit they do not make it clear - as well as the previews of the textbook hence why I wanted someone who had recently completed the module, as they would know the exact pre requisites)
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6 years ago
#7
Anyone know whether you are expected to actually draw Activity Networks for the D1 exam?
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8 months ago
#8
you need to know how to formulate a linear programming problem, as you'll have to do that from some of the new algorithms you do, but you don't actually solve any of those so thankfulllyyyy no graphical methods/ simplex in D2
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