AQA 6th June 2019 A - Level Further Maths Paper 2 Unofficial Mark Scheme

If you can remember anymore reply below and i'll add them on

Q1: Z- Z*= Z*-Z is not always true
Q2: y= ax + a
Q3: X^2 -1<1

volume of rev question = 2ab^2

vectors distance = 5.18

eigenvalues were 1 and 1/2

improper integral of x^(2)e^(-2x) was 25/4e^6

coupled de's
r = 4
y = 2400+1200e^(-3t/100)-3600e^(-t/100)
x = 2400-1800e(-t/100)-600e(-3t/100)

(edited 4 years ago)

Reply 1

aadz

What did you say for the weird roots of polynomials proof?

Reply 2

duppa

Original post by aadz

What did you say for the weird roots of polynomials proof?

Sort of just waffled really, said that there's too many variables for us to be able solve it since we only know 1 root, we'd have to know another root to be able to solve it. Hopefully i pick up a mark or 2

Reply 3

aadz

Basically what I said as well, did you finish the proof by induction question? I got to f(k) + 3 times some quadratic and then I said the quadratic was always even so that must always be a multiple of 6 but idk if that's right

Original post by duppa

Reply 4

Engineer4lyfe

What % do people think they got?

Reply 5

JZZZZZ

Need to apply n=2 and n=k+2

Original post by aadz

Reply 6

duppa

Original post by aadz

Yeah got that but didn’t say the even thing so reckon I’ll probably get 5/7

Reply 7

duppa

Original post by Engineer4lyfe

What % do people think they got?

Paper 1 about 80%, Paper 2 about 70%, not sure what grade boundaries will be though

Reply 8

aadz

Original post by Engineer4lyfe

What % do people think they got?

Maybe like low 70s/ high 60s avg from both papers, hope thats enough for an A

Reply 9

aadz

Original post by Engineer4lyfe

What % do people think they got?

Maybe like low 70s/ high 60s avg from both papers, hope thats enough for an A

Original post by JZZZZZ

Need to apply n=2 and n=k+2

Yeah was thinking something like that but never ended up doing it

Reply 10

aadz

Think the limit was 25/4e^6

Original post by duppa

If you can remember anymore reply below and i'll add them on

Q1: Z- Z*= Z*-Z is not always true
Q2: don't remember
Q3: X^2 -1<1

volume of rev question = 16ab^2?

vectors distance = 5.18

eigenvalues were 1 and 1/2

improper integral of x^(2)e^(-2x) was something e^-6

coupled de's
r = 4
y = 2400+1200e^(-3t/100)-3600e^(-t/100)
x = 2400-1800e(-t/100)-600e(-3t/100)

Reply 11

fjas313

like that ? excuse the terrible handwriting!!

Original post by JZZZZZ

Need to apply n=2 and n=k+2

Original post by aadz

Reply 12

Engineer4lyfe

Anyone get anything different for volumes of revolution? I got pi(2ab^2) I think. My limits were 2b and b?

Reply 13

iamdumbandstupid

I did similar thing for induction. So I consider the case f(k+1)= some polynomial and I split cases. Case 1 is when k is even, f(k+1)-f(k) is divisible by 6, similarly for k is odd.

Reply 14

therandompianist

does anyone know what question 11 was, after proof by induction

Reply 15

TWoolley

Question 2 was the question about the asymptotes and the answer was y=ax+a i think.
The eigenvectors I got were [1,2] for lambda = 1 and [4,3] for lambda = 1/2
Also, for the volumes of revolution the limits were ab and b.