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# Edexcel AS Mathematics C2- 25th May 2016 Thread

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1. i got 120 for P last question however i forgot to put units do i lose a mark?
2. (Original post by DW4)
I think it was:

-288k + 1944 = B
but k=7/2
-288(7/2) + 1944 = B
-1008 + 1944 = B
therefore B = 936
This is correctomundo

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3. (Original post by jbaten)
you must sub in the value of x into the 2nd order derivative so d^2p/dx^2 that will give you what your looking for if it is >0 then it is a minimum <0 it is a maximum.
I know that, I was replying to someone who wasn't sure that you had to find the perimeter not just the x value
4. wasnt k = 65/2. becuause if you do 65/2 *16 gives u 520 and -288+520 gives u 232
5. (Original post by furthermath12)
i got 120 for P last question however i forgot to put units do i lose a mark?
you wont lose any you would if you were doing a physics exam so remember for physics exams
6. (Original post by dhdhyfhf)
wasnt k = 65/2. becuause if you do 65/2 *16 gives u 520 and -288+520 gives u 232
I did the exact same thing. pretty sure were wrong though. ended up getting 7651 for B or something lmao
7. Damn it all went well apart from the 2^2x+5 which was 32y^2 and I was stupid and think I messed up the value for b cause I seem to remember writing something to do with 1008 was that used somewhere does anyone remember? Cheers
8. how many marks was question 8b, anyone remember ????
I did the exact same thing. pretty sure were wrong
though. ended up getting 7651 for B or something lmao
I got something like 28/6 and got like 4000 and something?? It still worked though, so what does this mean?
10. (Original post by ollyhermann)
perimiter 120, x was 17
my x was 16.661... something, so I just used the ANS button, thats cool right?
11. How many marks were 7ii and 8b worth??
12. anyone kno marks for expansion question, to get the expansion, then A K and B?
13. (Original post by TheOnlyAngel)
anyone got 3x+5y-95=0 ??? guess not....seems out of normal range.
i did!
14. (Original post by TheOnlyAngel)
anyone got 3x+5y-95=0 ??? guess not....seems out of normal range.
15. (Original post by DW4)
I think it was:

-288k + 1944 = B
but k=7/2
-288(7/2) + 1944 = B
-1008 + 1944 = B
therefore B = 936
I did this and I'm pretty sure its correct.
16. (Original post by Vlad Murzakov)
People are saying they got 120 for the perimeter.. Was it not 17?
The correct answer was 120. They asked for the minimum value of P (the perimeter) and 17 was the value of x. You get 17 (or indeed 16.66 or something) and substitute that back into P the find the minimum value of P.
17. yes I did!!
18. Can anybody inbox me an unofficial mark scheme or question paper?
19. (Original post by HaiderMukhles)
Can anybody inbox me an unofficial mark scheme or question paper?
Me too! Look at all these disappointed students at the bottom of the room

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