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# AQA A Level Maths Core 2 - 25th May 2016 [Exam Discussion]

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1. (Original post by Alfie Oliver)
Did anyone get k (in the translation question) as 5.5?
I did
2. (Original post by Jumay)
Arc in triangle question? I got 10.32, everyone I talked to used the same method as me but got different answers 0.o
I thought I got that one, but apparently its like 13.7 and I don't remember writing that.. Almost forgot to add the arc length on but spotted it with 10 mins to go :P

(Original post by amygardiner)
for K i got 13.5....
and the transformation was a stretch in y SF 3?
I changed stretch s.f. 1/3 in x-direction after writing what you did. I don't think s.f. 3 in y-direction is right because when you expanded both it was y=X+3 changes to y=3X+3 or something
3. (Original post by rubyobrien)
Anyone get -1648 as the coefficient of x^10?
YES, that was a tough and messy question
4. How was the cosx question done?
5. I got:

65.6 for the trapezium rule question
6 for U12 near the end
and for the sigma question at the end I got 90???

anyone get any of these
6. UN-OFFICIAL MARK SCHEME.
Of what I can remember..

1. b) a=2
2. b) x=-0.861
c) reflection in y-axis
3. a) 3x^-1/2 - 1
b) y=6
c) y + 2x = 13
d) k = 5.5
4. b) d = -2, a = 28
c) Sum to 21 - sum to 3. Can't remember exact.
5. b) area = 19.9
c) perimeter = 13.8 (something like that)
6. a) 65.6
b) i) translation (0,5)
ii) stretch in X-direction 1/3 sf
7. b) -1648
8. b) can't remember! Tan(X) = 1 and tan(X) =-5/4
c) lowest = 2, when theta = pi
9. a) c^(m/2 +6n)
b) X = 5/2

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7. (Original post by viktorh)
I got:

65.6 for the trapezium rule question
6 for U12 near the end
and for the sigma question at the end I got 90???

anyone get any of these
I think i got those i am sure of 90 and i think 6 as well
8. (Original post by BenAtkinson)
UN-OFFICIAL MARK SCHEME.
Of what I can remember..

1. b) a=2
2. b) x=-0.861
c) reflection in y-axis
3. a) 3x^-1/2 - 1
b) y=6
c) y + 2x = 13
d) k = 5.5
4. b) d = -2, a = 28
c) Sum to 21 - sum to 3. Can't remember exact.
5. b) area = 19.9
c) perimeter = 13.8 (something like that)
6. a) 65.6
b) i) translation (0,5)
ii) stretch in X-direction 1/3 sf
7. b) -1648
8. b) can't remember! Tan(X) = 1 and tan(X) =-5/4
c) lowest = 2, when theta = pi
9. a) c^(m/2 +6n)
b) X = 5/2

Posted from TSR Mobile
thank ****ing god someone got the same stuff as me
9. (Original post by Alfie Oliver)
Did anyone else get the binomial expansion answer as something like -1000 something it was like -1280 idk tho something around there?
Yeah I got -1000 something as well
10. (Original post by viktorh)
I got:

65.6 for the trapezium rule question
6 for U12 near the end
and for the sigma question at the end I got 90???

anyone get any of these
U12=6 seems familiar. I had a bit of a crisis with the trapezium rule, but I think I should've got it right, although idk if I put 65.6
11. (Original post by BenAtkinson)
UN-OFFICIAL MARK SCHEME.
Of what I can remember..

1. b) a=2
2. b) x=-0.861
c) reflection in y-axis
3. a) 3x^-1/2 - 1
b) y=6
c) y + 2x = 13
d) k = 5.5
4. b) d = -2, a = 28
c) Sum to 21 - sum to 3. Can't remember exact.
5. b) area = 19.9
c) perimeter = 13.8 (something like that)
6. a) 65.6
b) i) translation (0,5)
ii) stretch in X-direction 1/3 sf
7. b) -1648
8. b) can't remember! Tan(X) = 1 and tan(X) =-5/4
c) lowest = 2, when theta = pi
9. a) c^(m/2 +6n)
b) X = 5/2

Posted from TSR Mobile
Just a quickie, 1 b) was -2 Hehe
12. (Original post by BenAtkinson)
UN-OFFICIAL MARK SCHEME.
Of what I can remember..

1. b) a=2
2. b) x=-0.861
c) reflection in y-axis
3. a) 3x^-1/2 - 1
b) y=6
c) y + 2x = 13
d) k = 5.5
4. b) d = -2, a = 28
c) Sum to 21 - sum to 3. Can't remember exact.
5. b) area = 19.9
c) perimeter = 13.8 (something like that)
6. a) 65.6
b) i) translation (0,5)
ii) stretch in X-direction 1/3 sf
7. b) -1648
8. b) can't remember! Tan(X) = 1 and tan(X) =-5/4
c) lowest = 2, when theta = pi
9. a) c^(m/2 +6n)
b) X = 5/2

Posted from TSR Mobile
As far as i remember i think i got most of them same however for 1. b) i got -2
13. Anyone get the following??
a in first question =-2
Last logs question only solution =5/2
Perimeter of shaded = 13.8
Coefficient of x^10 = -1648
U12=37
Root C over d^2 = 3^(1/2m+6n)
14. (Original post by Samismad)
Just a quickie, 1 b) was -2 Hehe
I agree, It was -2 not 2
15. (Original post by rubyobrien)
Anyone get -1648 as the coefficient of x^10?
The same
16. In the perimeter of the shape question, when I rounded it to 3 significant figures I ended up with 14.0?😓
17. (Original post by Jumay)
Arc in triangle question? I got 10.32, everyone I talked to used the same method as me but got different answers 0.o
I got like ~3.41 for the arc length for the triangle and something like ~5.86 for r. I think you had to say that 1/2 r^2 x = 19.9(area of triangle)-1/2 r^2 x, therefore r^2 x = 19.9. You already know x, so substitute it in and get r^2 to be ~34 and r = 5.86 ish. Final perimeter should be about 13.7 or 13.8 depending on how you've rounded in the question.

Of course, I could be completely wrong
18. I got like -18144 for x^10 expansion?
19. (Original post by Shehryar01)
As far as i remember i think i got most of them same however for 1. b) i got -2
Yes, sorry my mistake!

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20. (Original post by BenAtkinson)
UN-OFFICIAL MARK SCHEME.
Of what I can remember..

1. b) a=2
2. b) x=-0.861
c) reflection in y-axis
3. a) 3x^-1/2 - 1
b) y=6
c) y + 2x = 13
d) k = 5.5
4. b) d = -2, a = 28
c) Sum to 21 - sum to 3. Can't remember exact.
5. b) area = 19.9
c) perimeter = 13.8 (something like that)
6. a) 65.6
b) i) translation (0,5)
ii) stretch in X-direction 1/3 sf
7. b) -1648
8. b) can't remember! Tan(X) = 1 and tan(X) =-5/4
c) lowest = 2, when theta = pi
9. a) c^(m/2 +6n)
b) X = 5/2

Posted from TSR Mobile
Oh crap I got c^m/2 -6n :/

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