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# AQA A2 Mathematics Pure Core 4 MPC4 - 17th June 2016

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Why bother with a post grad course - waste of time? 17-10-2016
1. (Original post by Yo12345)
I got the implicit differentiation right (2sec^x = 3x) and used sec^ = 1 + tan^2, but I got k=2 not 6. I got the integral in part b right, just had 1/2tan^-1(3x/2) and not 1/6. Would I get 2/3 on first and 7/7 on second for follow on marks?

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I should think so. I'm not too sure whether you'd get 7/7 or lose a mark for the second part however, I haven't studied maths mark scheme as much as with science subjects lol

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2. (Original post by steph-carys)
Pretty sure I got the same values as you and I can't see where we would've gone wrong, as I went over this again and again and my equations all worked out with these values
I'm so confused😅 Do you remember the coordinates of A and B and then the line equation? I'm gonna attempt it but vectors are evil so I'll probably mess up
3. (Original post by KittyKat97x)
I got the same
This is correct fo sure
4. (Original post by C0balt)
I should think so. I'm not too sure whether you'd get 7/7 or lose a mark for the second part however, I haven't studied maths mark scheme as much as with science subjects lol

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You will lose out a mark on final answer A1 so 6/7
5. (Original post by gcsekid)
2 marks max or given its correct in radians maybe 1
Marks were for
Identity
Two brackets
Cos= -1/6 and 1
Two marks for correct solutions
In all serius maybe lose A1,A2 for the answer been wrong unless it falls into special case aqa should just use graidians all the time
6. (Original post by Salty carpet)
I'm so confused😅 Do you remember the coordinates of A and B and then the line equation? I'm gonna attempt it but vectors are evil so I'll probably mess up
I can't, sorry!
7. (Original post by steph-carys)
I can't, sorry!
It's on the previous page as an attachment so don't worry I'll try it and get back to you
8. Is there an unofficial MS?
9. (Original post by JamieOH)
Is there an unofficial MS?
http://www.thestudentroom.co.uk/show....php?t=4172260
10. Cheers fella.
11. (Original post by Number Nine)
Bye bye uni
That's how I'm feeling too
12. (Original post by Parhomus)
Someone help me by telling me the method to the part c of vectors tyvm i think i got it wrong :c.
So how i did it was using the point of intersection (which i called Q)
lAQl=3lQBl (those are mod signs )
got mod AQ as 140/3 then as you know b lies on line L2, you do line L2-Q and you get a nice little quadratic which gives lambda values, then just sub them in
13. Was the direction vector of l2 (3,-5,-1) or (3,-5,1)?

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14. (Original post by Salty carpet)
It's on the previous page as an attachment so don't worry I'll try it and get back to you
I did it again and found mu as 1/2... I reckon we might have found vector AB incorrectly? Possibly writing OB and OA the wrong way around?
15. (Original post by Samtheoneson)
You will lose out a mark on final answer A1 so 6/7
And 2/3 for part a)?

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16. (Original post by Yo12345)
Was the direction vector of l2 (3,-5,-1) or (3,-5,1)?

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(3, -5, 1)
17. (Original post by ValerieKR)
(3, -5, 1)
Ffs, would I only lose one mark for getting costheta as 92/140 and not 52/140 as I got the sign wrong?

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18. Anyone remember question 4? I want to have a go at it again
19. Would I get a mark for finding the length of CD for 6c), or is that irrelevant?

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20. (Original post by Yo12345)
Would I get a mark for finding the length of CD for 6c), or is that irrelevant?

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I'm counting on it

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Updated: August 17, 2016
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