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Edexcel D1 - 17th June, 2016 [Exam discussion]

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My pairings were 75, 85, and 125. 99% sure they're right


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Original post by iMacJack
My pairings were 75, 85, and 125. 99% sure they're right


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Yeah, pretty sure I got the same. In 125 there was some stupid path going all around the network but yeah.
Original post by mrgameraidz
Yeah, pretty sure I got the same. In 125 there was some stupid path going all around the network but yeah.


Yeah I saw it at the last minute and changed it! It was the most ridiculous path ever. Even my shortest pairing 75 had like 4/5 arcs that needed repeating or something like that!


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Original post by iMacJack
Yeah I saw it at the last minute and changed it! It was the most ridiculous path ever. Even my shortest pairing 75 had like 4/5 arcs that needed repeating or something like that!


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Theres so much controversy surrounding the optimal vertex.

If you maxmise 1.5x+y then you have to do simultaneous equations of

-x+24y<24
7x+8y<112

Then x=156/11 y=35/2

Therefore, V(13,2)

I clicked the wrong reply button
(edited 7 years ago)
Original post by EricPiphany
Technically, I have it. But I ain't sharing it just yet.


Could you please upload it, even just send it privately. Thanks.
Original post by mehtj006
Theres so much controversy surrounding the optimal vertex.

If you maxmise 1.5x+y then you have to do simultaneous equations of

-x+24y<24
7x+8y<112

Then x=156/11 y=35/2

Therefore, V(13,2)

I clicked the wrong reply button


it is maximise x + 1.5y for the 9392922828th time. You're wrong.


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Original post by iMacJack
it is maximise x + 1.5y for the 9392922828th time. You're wrong.


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maximise 1.5x+y obviously :smile:

it clearly said y is 50% larger than x, therefore, you multiply x by 1,5.
Original post by mehtj006
maximise 1.5x+y obviously :smile:

it clearly said y is 50% larger than x, therefore, you multiply x by 1,5.


If you think about it matey, you get your values by looking at the graph. But the Capacity Maximisation is to show how much each of those values are worth in real life terms. So the y values are worth more than the x values right, we agree on that. After all, they are 1.5x bigger. So if we want to show they are worth more and add greater value to the Capacity Maximisation, they must have more for each y value than for each x value. Thus 1.5y and not 1.5x.
Original post by venerable crow
put 12-13 hours not days oops


It might be hours I am not sure( didn't mention units at the exam used the word "between" instead)
i put 6.5
Original post by mehtj006
maximise 1.5x+y obviously :smile:

it clearly said y is 50% larger than x, therefore, you multiply x by 1,5.


Eyy Newton Raphson Jam your hype, it was
C= 2x + 3y ( x + 1.5y )
I swear there were two points where the number of workers could be 5. I put them both down.
Original post by hogree
If you think about it matey, you get your values by looking at the graph. But the Capacity Maximisation is to show how much each of those values are worth in real life terms. So the y values are worth more than the x values right, we agree on that. After all, they are 1.5x bigger. So if we want to show they are worth more and add greater value to the Capacity Maximisation, they must have more for each y value than for each x value. Thus 1.5y and not 1.5x.

]How many marks do you think ill lose then
Original post by Nuggetsarelife
Eyy Newton Raphson Jam your hype, it was
C= 2x + 3y ( x + 1.5y )


agreed


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D1 content wise is not hard at all. Just the time factor can take its toll. I lost like around 8-10 marks on questions I didn't have time to attempt/complete. Hoping I got everything else right to scrape that A. Anyone else lost marks cos of time????
Original post by brokeins1
It might be hours I am not sure( didn't mention units at the exam used the word "between" instead)


thgt it said days in it, if not then thatll be fine
Original post by mrgameraidz
Yeah, pretty sure I got the same. In 125 there was some stupid path going all around the network but yeah.


The paths were so stupid! No wonder I ran out of time, honestly!


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Original post by iMacJack
Lol.

Year 12, C1 73/75, C2 75/75, S1 70/75, FP1 66/75, D1 63/75, S2 not yet sat. It's not that great.. I didn't like the D1 paper today at all.

How about you mate?


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'not that great'

You crazy? Thats sickkkk!

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Did anyone else have a little cry when they saw those weird squiggly lines as paths on the dijkstra question? (Got it right but still made me wanna die)


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Original post by Themathgeek
'not that great'

You crazy? Thats sickkkk!

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Thank you dude! Much love.


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