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

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oh well it was only 2 marks would've lost one because i stated the bracket equals one
man, that was tough. ugh, i need to do well in d1 now
Original post by JackThorpe7
IMG_0500.JPGAll My answers, really not sure on the coordinates for E though.


For E I got (11,0,0) and (24,3,0) I think
What did everybody get for question 9b
what did you let get as x for binomial 73/3?
Reply 1505
Avatar for JB51
JB51
1
Feel the exact same, everyone saying how easy they thought it was and I'm sat here like well ****
Original post by Hexaneandheels
My acute angle was 21.8 or something I think...eeek


Mine was 69.1°
Reply 1507
Avatar for CD223
CD223
OP
10
I'm gutted. A* gone.


Posted from TSR Mobile
Reply 1508
Avatar for Ual12
Ual12
6
For last part of question 3, the decreasing funtion h(x), i differentiated it to 1/(2x-3) , but what did we have to do after that??
I subbed in 3 and said it was >0 so its decreasing,but it was just a guess :frown:
Original post by CharlesMolester
What did everybody get for question 9b


57.3****you34
Original post by laurenn1995
on the trig question r(cosx-angle) did anyone get r=root29 and angle +1.19??? Anyone?? Think that's what I put... And then x at max value 5.09 or something?


That's exactly what I got
it usually 55 or less for an A so shouldn't be that bad the last 6 its been 55 or less.
Original post by bw_wwfc
57.3****you34


Was that the last qu? I got r=3
Idid the same I was like 'what now?' when I got 1/2x-3. I put <1 but never =0? So therefore decreasing or something

Im hoping for a few method marks...
Original post by Ual12
For last part of question 3, the decreasing funtion h(x), i differentiated it to 1/(2x-3) , but what did we have to do after that??
I subbed in 3 and said it was >0 so its decreasing,but it was just a guess :frown:
Original post by CD223
I'm gutted. A* gone.


Posted from TSR Mobile


Dont worry man you done good in C3 so you still have a clear chance of an A*.
Original post by CD223
I'm gutted. A* gone.


Posted from TSR Mobile


I know how you feel :frown:
Original post by RavinderKlair97
it usually 55 or less for an A so shouldn't be that bad the last 6 its been 55 or less.

Dead easy paper though; nobody struggled so High Boundaries :frown:
Original post by ForgottenApple
Dead easy paper though; nobody struggled so High Boundaries :frown:


You're forgetting the people that don't come on thestudentroom who didn't find it so nice:P
I think they'll be a little higher, 58-60 for an A maybe
Original post by Ual12
For last part of question 3, the decreasing funtion h(x), i differentiated it to 1/(2x-3) , but what did we have to do after that??
I subbed in 3 and said it was >0 so its decreasing,but it was just a guess :frown:


Sub in x=2 which gives -4 so dy/dx=-4 that implies that it's decreasing


Posted from TSR Mobile
For the h(x) one, I did: h(x) = 1/2x-3; h'(x)=-2/(2x-3)^2

Then some drivel about how x is negative, (2x-3)^2 is positive so -2/(2x-3)^2 is negative
and the same for positive
so therefore it's decreasing.

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