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

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1. (Original post by mgill17)
Anyone know where I can get some really hard questions for this unit? I've done as many AQA papers as I can but I fear that that's comfort revising now after Wednesday's ordeal. I want to prepare for the literal worst.

What are solomon papers like and do they even exist for MPC4, I hear people go on about them all the time?

I don't understand how the AS core papers were similar to last year's standards then that abomination happened.
http://www.physicsandmathstutor.com/...rs/C4-solomon/
these are the edexcel Solomon papers but I find that the majority of the questions are relevant to AQA, also I have found that they have questions applied in different ways so they are pretty good to try and prepare for different styled questions
My prediction for this year is the last question to be a hard vectors question. Anyone else got any other predictions? :P
When is there not a hard vectors question on core 4?
3. How do you find max rate of growth when you have dy/dx?

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4. Guys I'm doing the 2015 paper Question 1 B, I have -1/6ln25 + 3ln5. It should be in the form kln5, how do I this?
5. (Original post by Yo12345)
How do you find max rate of growth when you have dy/dx?

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If you imagine you plot dy/dx on a graph, and call that y=f(x) then the maximum point will be where f'(x) = 0, or in other words, where d^2y/dx^2 = 0! (and I guess d^3y/dx^3 < 0...)
6. (Original post by Dinasaurus)
Guys I'm doing the 2015 paper Question 1 B, I have -1/6ln25 + 3ln5. It should be in the form kln5, how do I this?
ln25 is ln5^2 = 2ln5

(-1/6)*2ln5 + 3ln5 = (-1/3)ln5 + 3ln5 = (8/3)ln5
7. PLZ Someone help I think I am getting mental breakdown

I can't see to get the answer for this convert parametric into cartesian

x = t / 2t-1
y = t / t-1
8. (Original post by Examguy123)
When is there not a hard vectors question on core 4?
I recon it'll be the last one though, like the pinnacle of difficulty on the paper.
9. (Original post by bartbarrow)
ln25 is ln5^2 = 2ln5

(-1/6)*2ln5 + 3ln5 = (-1/3)ln5 + 3ln5 = (8/3)ln5
How do -1/3 and 3 make 8/3?
10. (Original post by Dinasaurus)
How do -1/3 and 3 make 8/3?
(-1/3) + 3 = 8/3? unless I'm going crazy
11. (Original post by koolgurl14)
PLZ Someone help I think I am getting mental breakdown

I can't see to get the answer for this convert parametric into cartesian

x = t / 2t-1
y = t / t-1
Tricky - managed to get it down to (y/x) = 2 + (y/t) although not sure that helps...

When AQA hand out difficult parametric -> cartesians, they usually provide some base format of some kind (e.g. xy + y^2 + x^2 = k, find k) or similar. None of that given?
12. (Original post by bartbarrow)
(-1/3) + 3 = 8/3? unless I'm going crazy
Oh wow, I must be going crazy then, so dumb moment.
13. (Original post by Dinasaurus)
Guys I'm doing the 2015 paper Question 1 B, I have -1/6ln25 + 3ln5. It should be in the form kln5, how do I this?
with -1/6 ln(25) turn the 25 in to 52 and bring the 2 down
14. (Original post by Mentalmirz)
http://www.physicsandmathstutor.com/...rs/C4-solomon/
these are the edexcel Solomon papers but I find that the majority of the questions are relevant to AQA, also I have found that they have questions applied in different ways so they are pretty good to try and prepare for different styled questions
This might be a good shout then. I think the style of writing was part of the reason I got so phased with some of them I guess. Hoping this one isn't too bad considering I haven't got an A in core 3 now and at best I scrape As in core 4
15. (Original post by koolgurl14)
PLZ Someone help I think I am getting mental breakdown

I can't see to get the answer for this convert parametric into cartesian

x = t / 2t-1
y = t / t-1
what's the answer? I think I have one.
16. (Original post by koolgurl14)
PLZ Someone help I think I am getting mental breakdown

I can't see to get the answer for this convert parametric into cartesian

x = t / 2t-1
y = t / t-1
Got it I think.. is the answer 1/(x-1)? If so I can post a solution.
17. (Original post by Dinasaurus)
Guys I'm doing the 2015 paper Question 1 B, I have -1/6ln25 + 3ln5. It should be in the form kln5, how do I this?
Here u go
18. (Original post by mgill17)
This might be a good shout then. I think the style of writing was part of the reason I got so phased with some of them I guess. Hoping this one isn't too bad considering I haven't got an A in core 3 now and at best I scrape As in core 4
same, I'm seriously hoping that this paper is reasonable :/
19. http://www.mrbartonmaths.com/resourc...QAJune08QP.pdf

For question 7c, why have they chosen y = 0 and not y=-1

MS http://www.mrbartonmaths.com/resourc...QAJune08MS.pdf
20. (Original post by bartbarrow)
Got it I think.. is the answer 1/(x-1)? If so I can post a solution.
(Original post by Shumaya)
what's the answer? I think I have one.
(Original post by bartbarrow)
Tricky - managed to get it down to (y/x) = 2 + (y/t) although not sure that helps...

When AQA hand out difficult parametric -> cartesians, they usually provide some base format of some kind (e.g. xy + y^2 + x^2 = k, find k) or similar. None of that given?
The answer is y = x/1-x I wasted this whole day to figure it out ...

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