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# AQA A2 Mathematics MPC4 Core 4 - 9th June 2015 [Discussion & unofficial markscheme] watch

1. (Original post by EmilyC96)
Could someone please explain 6b on jan09 for me please :/ I got 6a right just no idea for part b

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You need to rearrange the expression you got for to get y on it's own and then sub it into the original equation I believe.
2. What's the difference between ln15^10 and ln(15)^10?

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3. Can somebody explain this to me. june 14 q4c

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Attached Images

4. (Original post by CD223)
If anyone likes a challenge:
Attachment 418305

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Where is this from?
Solutions?
5. (Original post by Tiwa)
You need to rearrange the expression you got for to get y on it's own and then sub it into the original equation I believe.
Still can't get it :/ hmmmm

EDIT: I got it! Was trying to sub y back in to dy/dx 😑 hahaa

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6. (Original post by the_googly)
Can somebody explain this to me. june 14 q4c

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Did u manage to work it out? I can post u my solution..
7. I wasn't even worried for this anyway so now that I think I've got the 100 in Core 3 it's just like meh 😂
8. Didn't think core 3 was that bad, it was probably the hardest core 3 they made, should expect an A to be like 57 or something. Could anyone help me on the last part of this question, how are you meant to draw the rhombus? How to you know which sides go where?

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9. (Original post by Jimmy20002012)
Didn't think core 3 was that bad, it was probably the hardest core 3 they made, should expect an A to be like 57 or something. Could anyone help me on the last part of this question, how are you meant to draw the rhombus? How to you know which sides go where?

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I done this question
Let me send it to you

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10. (Original post by Jimmy20002012)
Didn't think core 3 was that bad, it was probably the hardest core 3 they made, should expect an A to be like 57 or something. Could anyone help me on the last part of this question, how are you meant to draw the rhombus? How to you know which sides go where?

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Hope this helps

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11. whats the best way to learn vectors and exponential growth/decay questions. I know past papers are the key but to actually understand it? just understanding C4 in general actually :/
12. (Original post by ankitaa123)
whats the best way to learn vectors and exponential growth/decay questions. I know past papers are the key but to actually understand it? just understanding C4 in general actually :/
Go on Mrbartonmaths website, it's really good or watch jack brown on YouTube he's really good too

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13. (Original post by Stepidermis)
I wasn't even worried for this anyway so now that I think I've got the 100 in Core 3 it's just like meh 😂
--
14. (Original post by JF2013)
Go on Mrbartonmaths website, it's really good or watch jack brown on YouTube he's really good too

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Thank you
15. (Original post by JF2013)

Hope this helps

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I do understand the method, but how you meant to draw it, like how do you know where D lies as I got that wrong when sketching so found different distances? Thanks

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16. (Original post by Jimmy20002012)
I do understand the method, but how you meant to draw it, like how do you know where D lies as I got that wrong when sketching so found different distances? Thanks

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Earlier on in the question it states that ABC is an acute angle, so the points ABC have to join together, this means that D can only be in one other place
17. (Original post by ucasunderdog)
Earlier on in the question it states that ABC is an acute angle, so the points ABC have to join together, this means that D can only be in one other place
Ahh that kinda makes sense. How did you find C3?

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18. (Original post by Jimmy20002012)
Ahh that kinda makes sense. How did you find C3?

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It was a pretty difficult paper compared to the previous years, but I think it went well overall, just hoping c4 won't be a ***** like last year
19. (Original post by the_googly)
What's the difference between ln15^10 and ln(15)^10?

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The difference is that the first is the natural log of 15^10, whereas the second is the [natural log of 15]^10 .

EDIT: going to sleep so can't respond xD!
20. (Original post by Tiwa)
It was the most difficult C3 paper in my opinion. I made some dumb mistakes, but I found it alright. I was so happy about the integration by substitution question as I actually put it in the form . That question wasn't easy at all. How did you find it?
Ah no! I found it okay I guess - most people agreed with my mark scheme which was good. Just so nervous for Core 4 as I think it will be hard

(Original post by HennersPD)
Im so upset what ums do you think 66/75 will be? :/ need A* in maths for bath now
Don't be! 66 will definitely be 90+ UMS. Can't see how it wouldn't be!

(Original post by Willff)
Where is this from?
Solutions?
June 2011 pilot paper.

Solution:

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