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

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y = e / (2(1-x)^1/2(1-ln(2(1-x)^1/2))) ?
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!
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
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?
Original post by Yo12345
y = e / (2(1-x)^1/2(1-ln(2(1-x)^1/2))) ?


ye
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
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)
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
Original post by Yo12345
y = e / (2(1-x)^1/2(1-ln(2(1-x)^1/2))) ?

I got this too :smile:
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!
what was the binomial expanasion answer i got a really messy one ayone else?
UMS for 65/75 predictions?
k was 2 right? For the d theta/dx question?
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
Did anyone else get 9/2 e^4 for their gradient at (ln2, 1/2)?
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?
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?
Yeah some **** like that

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Original post by Yo12345
k was 2 right? For the d theta/dx question?


k was 6.
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Jm098
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Original post by WillTwigger
UMS for 65/75 predictions?


id say thats 90

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