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

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1. y = e / (2(1-x)^1/2(1-ln(2(1-x)^1/2))) ?
2. (Original post by SunDun111)
I did it completley different, I Differentiated implicatley got Sec^ and the theta, changed it into Tan then rearranged the original to put it in but got 6 as well is this valid?
I did this too!
3. (Original post by SunDun111)
I did it completley different, I Differentiated implicatley got Sec^ and the theta, changed it into Tan then rearranged the original to put it in but got 6 as well is this valid?
I did the same, it's fine
4. Uuurgh so annoyed core 3 went really well for me but this didn't. Hope my core 3 ums brings me up to A* :/ For the integration question I got 9/2ln3 -69/2, but this comes up as a negative number.. Have I done it wrong?
5. (Original post by Yo12345)
y = e / (2(1-x)^1/2(1-ln(2(1-x)^1/2))) ?
ye
6. (Original post by Yo12345)
y = e / (2(1-x)^1/2(1-ln(2(1-x)^1/2))) ?
that is what i got i am pretty sure its right
7. (Original post by maisym00)
Uuurgh so annoyed core 3 went really well for me but this didn't. Hope my core 3 ums brings me up to A* :/ For the integration question I got 9/2ln3 -69/2, but this comes up as a negative number.. Have I done it wrong?
I'm pretty sure that was right, if not very similar (69/2 I definitely recognise)
8. (Original post by maisym00)
Uuurgh so annoyed core 3 went really well for me but this didn't. Hope my core 3 ums brings me up to A* :/ For the integration question I got 9/2ln3 -69/2, but this comes up as a negative number.. Have I done it wrong?
That is correct
9. (Original post by Yo12345)
y = e / (2(1-x)^1/2(1-ln(2(1-x)^1/2))) ?
I got this too
10. (Original post by maisym00)
Uuurgh so annoyed core 3 went really well for me but this didn't. Hope my core 3 ums brings me up to A* :/ For the integration question I got 9/2ln3 -69/2, but this comes up as a negative number.. Have I done it wrong?
No, it was negative, my calculator gave me a negative number like -25 to -35, and my answer was/similar to yours, yay!
11. what was the binomial expanasion answer i got a really messy one ayone else?
12. UMS for 65/75 predictions?
13. k was 2 right? For the d theta/dx question?
14. (Original post by maisym00)
Uuurgh so annoyed core 3 went really well for me but this didn't. Hope my core 3 ums brings me up to A* :/ For the integration question I got 9/2ln3 -69/2, but this comes up as a negative number.. Have I done it wrong?
im pretty sure 9/2ln3<69/2 => it should be a negative number anyway you had to leave it in its exact form
15. Did anyone else get 9/2 e^4 for their gradient at (ln2, 1/2)?
16. Anyone know if the UMS needed for an A* needs to be 90% in C3 and separately 90% in C4 or can it be a combined total of the two?
17. I sometimes forgot to cross out my incorrect working and leave it in there as well as the correct answer, will they deduct marks for wrong working even if I did the correct working later on? And on the last question I intergrated both correctly but didn't have time to put it in an equation and calculate c. How many marks do you think I'll get?
18. Yeah some **** like that

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19. (Original post by Yo12345)
k was 2 right? For the d theta/dx question?
k was 6.
20. (Original post by WillTwigger)
UMS for 65/75 predictions?
id say thats 90

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