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

Reply 700

C0balt

16

Original post by -jordan-

Use of the standard integral for inverse tanx is on the Core 3 spec though. Shouldn't be unfamiliar to anyone.

Oh is it? I clearly wasn't paying attention when I worked through C3

Reply 701

Hrchjbff

1

Is there a mark scheme out yet, plus could have got a lot higher is I had more time, hardly enough time to think about some of the questions properly.

Reply 702

douglaswill

2

Original post by BioStudentx

I used the quotient rule 2 times, simplified it etc etc. Took a good 15 minutes and ended up with 0.5e^4
I don't know how you could differentiate them bloody parametrics without the quotient rule.

got that too. took me two pages

Reply 703

AmashQamar97

1

I don't see why anyone would wanna use that formula from FP2 for that question, you can just the sec^2x = tan^2x + 1 to show it

Reply 704

omarharoun3

2

Original post by BioStudentx

I used the quotient rule 2 times, simplified it etc etc. Took a good 15 minutes and ended up with 0.5e^4
I don't know how you could differentiate them bloody parametrics without the quotient rule.

i used the product rule with (3t)^-1 and it gave me the same answer!

Reply 705

douglaswill

2

Original post by tanyapotter

they'll be low but that low?

stats probably 59 for an A.
core 3 probably 54.
core 4 probably 55

Reply 706

Hrchjbff

1

My chances of going to uni now are as big as grey worms d*ck

Reply 707

robzwolf

2

Original post by BioStudentx

I used the quotient rule 2 times, simplified it etc etc. Took a good 15 minutes and ended up with 0.5e^4
I don't know how you could differentiate them bloody parametrics without the quotient rule.

Without the quotient rule? How?

Reply 708

Salty carpet

2

Original post by C0balt

Posted from TSR Mobile

Cheers lad :smile:

Reply 709

LiesandAlibis

1

Original post by BioStudentx

I used the quotient rule 2 times, simplified it etc etc. Took a good 15 minutes and ended up with 0.5e^4
I don't know how you could differentiate them bloody parametrics without the quotient rule.

I only used the quotient rule once - for the y equation.
The x equation could be split into 1/4 - (e^2-6t)/4 or whatever it was, no?
Regardless, I got the same answer of (1/2)e^4

Reply 710

C0balt

16

Original post by Salty carpet

Cheers lad :smile:

no probs

Original post by robzwolf

Without the quotient rule? How?

I did the produce rule by writing it 1/3*t^-1*e^3t cause I hate the quotient rule, too many steps for me lol

Reply 711

mgill17

6

Original post by Chickychick

Does anybody remember how many marks were for each questions roughly in total?

I don't know the names of the topics bc i was literally taught core 4 in three weeks nor do I know if these are in order but...

Q1- Binomial Q - 11 marks (99% sure)
a) Partial fraction 3 marks
b) Binomial Exp 7 marks
c) Valid values of |x| 1 mark

Q2-: Using the double angle formula on 3Cos2(theta) to form and solve that quadratic - 5 Marks (this is definite)

Q3- The one with sinA/sinB/CosA/CosB - 6? - I can't remember the individual parts apart from part a was a 1 marker :frown:

Q4- The other partial fractions one 7?
There was the actual partial fraction (3 Marks)
Then the integral/area bit (4 Marks?)

Q5- Exponential/Decay - 11?
a) Showing K was 1 mark
b) Finding the m0 of the similar isotope was 2 marks?
c) Finding the Half Life was 4 marks
*there was another part but i dont remember it*

Q6- Vectors - 15 (this is definite)
a)Acute angle 5 Marks
b) Show they intersect 5 Marks
c) Find C and D 5 Marks

Q7- Parametrics- 10
a) 5 or 6 marks? (Finding gradient at t=2/3)
b) 2 marks (show that x=...)
c) 2 marks (show that the cartesian can be written in the form y=e/(fx)[ln(fx)])

Q8- Differential Equation - 10 (this is definite)
a)3 marks
b) 7 marks

Edit: I don't know why but I seem to think one of the questions was just two 4 markers, the only one that would fit with would be the second partial fraction question...someone correct me if they think I'm wrong and I'll edit

(edited 7 years ago)

Reply 712

Salty carpet

2

Original post by C0balt

Posted from TSR Mobile

I got got the correct value for dy/dx and subbed in correctly but simplified incorrectly... What an idiot.... Do you think I'd lose one, or two marks?

Reply 713

JPencil

9

Can anyone remember the vectors question? I would like to do it again. Also C3: 66, C4: 72, safe A*?

Posted from TSR Mobile

Reply 714

Maphec

10

Original post by JPencil

Can anyone remember the vectors question? I would like to do it again. Also C3: 66, C4: 72, safe A*?

Posted from TSR Mobile

woah, the highest C4 A* has ever been is 63... youre saying it went up by 9?
and 64 was the A* for last year, so it's definitely lower.

Reply 715

C0balt

16

Original post by Salty carpet

I got got the correct value for dy/dx and subbed in correctly but simplified incorrectly... What an idiot.... Do you think I'd lose one, or two marks?

simplified the algebraic expression incorrectly or simplified numerically incorrectly?
I'd say two for the first case and one for the second case because you'd usually get one for expression and one for final answer

Reply 716

JPencil

9

Original post by JPencil

Can anyone remember the vectors question? I would like to do it again. Also C3: 66, C4: 72, safe A*?
Could someone also collate all the fragmented mark schemes into an "offical unofficial" ms?
Posted from TSR Mobile

Posted from TSR Mobile

Reply 717

crimson1234

2

Original post by mgill17

I don't know the names of the topics bc i was literally taught core 4 in three weeks nor do I know if these are in order but...

Q1- Binomial Q - 11 marks (99% sure)
a) Partial fraction 3 marks
b) Binomial Exp 7 marks
c) Valid values of |x| 1 mark

Q2-: Using the double angle formula on 3Cos2(theta) to form and solve that quadratic - 5 Marks (this is definite)

Q3- The one with sinA/sinB/CosA/CosB - 6? - I can't remember the individual parts apart from part a was a 1 marker :frown:

Q4- The other partial fractions one 7?
There was the actual partial fraction (3 Marks)
Then the integral/area bit (4 Marks?)

Q5- Exponential/Decay - 11?
a) Showing K was 1 mark
b) Finding the m0 of the similar isotope was 2 marks?
c) Finding the Half Life was 4 marks
*there was another part but i dont remember it*

Q6- Vectors - 15 (this is definite)
a)Acute angle 5 Marks
b) Show they intersect 5 Marks
c) Find C and D 5 Marks

Q7- Parametrics- 10
a) 5 or 6 marks? (Finding gradient at t=2/3)
b) 2 marks (show that x=...)
c) 2 marks (show that the cartesian can be written in the form y=e/(fx)[ln(fx)])

Q8- Differential Equation - 10 (this is definite)
a)3 marks
b) 7 marks

I don't think there were anymore parts for question 5

Posted from TSR Mobile

Reply 718

bencurnow

1

1) A = -5/2, B = 9/2
-1 + 7x - (22/3)x2
-1/2 < x < 1/2

2) x = 99.6, 206.4

3) p = 2/15
r = 1/3, s = 4/15

4) -3x + 2 + 9/(2x-3)
-69/2, 9/2

5) 330 days

6) cos = 13/35
(2, 0, -1)
C = (0, 10/3, -5/3) D = (4, -10/3, -1/3)

7) (1/2)e^4
y = e / (2sqrt(1-x))(1-ln(2sqrt(1-x)))

8) k = 6
sin3y - 3ycos3y - pi = (1/6)tan^(-1)(3x/2)

(edited 7 years ago)

Reply 719

olatee

2

Can somone remember the x and y for the cartesian equation