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

Reply 340

willmotg

2

Praying scheduling without a Gantt chart doesn't come up...that video is great though.

Reply 341

Student403

19

Original post by willmotg

Praying scheduling without a Gantt chart doesn't come up...that video is great though.

If anything it might lower the boundaries? :dontknow:

Reply 342

willmotg

2

Original post by Student403

If anything it might lower the boundaries? :dontknow:

With any luck :s-smilie:

Reply 343

iMacJack

16

Hopefully a Gantt chart comes up but not scheduling. Think I will cry if scheduling comes up

Posted from TSR Mobile

Reply 344

Student403

19

Original post by iMacJack

Hopefully a Gantt chart comes up but not scheduling. Think I will cry if scheduling comes up

Posted from TSR Mobile

"Schedule these activities using the minimum number of workers"

????????????????? :frown:

Reply 345

iMacJack

16

Original post by Student403

"Schedule these activities using the minimum number of workers"

????????????????? :frown:

Man I know, I will honestly have a breakdown :frown:

Reply 346

willmotg

2

Original post by Student403

"Schedule these activities using the minimum number of workers"

????????????????? :frown:

It's time-consuming, but the video posted above is a great tutorial - basically, if you have a choice then use the activity with the lowest finish time, but always check that it works when you give it to the first available worker. :smile:

Reply 347

splashywill

17

Can anyone tell me a quick method of how to know whether the region to shade in linear programming is above the line or below the line if you're given 6x + 5y <= 60

Reply 348

Pablo Picasso

2

Original post by splashywill

Can anyone tell me a quick method of how to know whether the region to shade in linear programming is above the line or below the line if you're given 6x + 5y <= 60

X>5
Shade below
X<5
Shade above

Just shade the opposite to what the arrow is saying

Reply 349

boyyo

6

https://d0247e65b1a6ead8e6286cd43803e643462f2b31.googledrive.com/host/0B1ZiqBksUHNYNlBRQkZFLXdQS0E/January%202015%20(IAL)%20QP%20-%20D1%20Edexcel.pdf

Can anyone help me with 6d here. What would be the objective fucntion?
Thanks :smile:

Reply 350

Kevin De Bruyne

21

Original post by splashywill

Can anyone tell me a quick method of how to know whether the region to shade in linear programming is above the line or below the line if you're given 6x + 5y <= 60

Take nice points around the line and test them. Eg you know (5,6) is a point (as you can see from drawing the line) so move x like 1 to the right and see that it becomes 36+30 = 66, which isn't right. Move y up one and that gives you 30 + 35 = 65. So can't move y any further up or to the right, so the area is going to be bounded by the line, the x and y axis.

Reply 351

Student403

19

Original post by willmotg

It's time-consuming, but the video posted above is a great tutorial - basically, if you have a choice then use the activity with the lowest finish time, but always check that it works when you give it to the first available worker. :smile:

Thanks, yeah!

Original post by iMacJack

Man I know, I will honestly have a breakdown :frown:

Chin up mate it's alright! Remember if D1 doesn't go as well as you hoped, you'll still get an A! And getting even 70 UMS in D1 will allow you to get the A* with minimal effort at A2

Reply 352

thelegend99

4

What will we have to prove (for tomorrow)? pls help!

Reply 353

Pablo Picasso

2

Original post by boyyo

https://d0247e65b1a6ead8e6286cd43803e643462f2b31.googledrive.com/host/0B1ZiqBksUHNYNlBRQkZFLXdQS0E/January%202015%20(IAL)%20QP%20-%20D1%20Edexcel.pdf

Can anyone help me with 6d here. What would be the objective fucntion?
Thanks :smile:

P = x + 3y
Therefore
30 = x + 3y is the objective line
gradient of -1/3

(edited 7 years ago)

Reply 354

thelegend99

4

Original post by boyyo

https://d0247e65b1a6ead8e6286cd43803e643462f2b31.googledrive.com/host/0B1ZiqBksUHNYNlBRQkZFLXdQS0E/January%202015%20(IAL)%20QP%20-%20D1%20Edexcel.pdf

Can anyone help me with 6d here. What would be the objective fucntion?
Thanks :smile:

I'm not sure on that question as well! Pls let me know if you get the answer for it- the mark scheme isn't clear about it.

Reply 355

Midgeymoo17

13

Original post by CutieTootsie

who else has barely done any revision for D1?

Me but I really not need to do D1 as my six other units: Fp1,FP2,D2,S2,S1 and S3 will be better.

Reply 356

Pablo Picasso

2

Original post by thelegend99

What will we have to prove (for tomorrow)? pls help!

No proof but definition of a couple like

Matching
Path
Route
Difference between Prim & Kruskal
Why dummies are used

Reply 357

thelegend99

4

Original post by Pablo Picasso

No proof but definition of a couple like

Matching
Path
Route
Difference between Prim & Kruskal
Why dummies are used

I saw something where you had to prove the no of valencies that are odd occur in pairs or something?

Reply 358

boyyo

6

Original post by Pablo Picasso

P = 3x + y
Therefore
30 = 3x + y is the objective line

umm, I kinda get what your doing here, could you explain it please?

I was thinking, the cost of y = 3x.
So the total cost would be, 3x+x ?

@thelegend99

Reply 359

Midgeymoo17

13

Original post by target21859

I did well last year apart from M1 haha. Thanks for the kind words of encouragement. Much appreciated. Still sucks I have D1 and M2 on the same day :biggrin:

I have a clash between Core 4 (AQA) and Decision 1 (Edexcel) with 25% Extra Time C4, 50% extra time in D1. Total exam time 4hrs 13 mins excluding my supervised rest breaks. Really looking forward to tomorrow.

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

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