AS math 9709/May June/2018/ Paper 12 Hard Or Easy?

[Paula V]

i remember getting that for AC lol

ooo wait, sorry, yeah that was for AC (I don't remember the letters that well)

 

[Paula V]

i remember getting that for AC lol

so besides AC, what was the other one? DA?

 

[Paula V]

I was thinking, what would have happened if the hackers would have leaked the backup paper too (the one that we got), do they have a backup for the backup paper?

 

[Paula V]

Also, did anybody see the leaked paper? Was it easier or just as hard?

 

[Pravin Hapugaswatta]

It said the first week after the change, so the first term wasn't the week of the change, it was the week after it, so the 12th week after the change is the 12th term

Is it first week after the change or after the first week of change?

 

[ThePacifics]

I got the same answer.

I think I got 6i-5j-4k

 

[Tauqir_hamed]

what did you get for the angle one ( something like cosx + 3sinx > 0 ) .. i got < 146 and >326 i think

 

[Tauqir_hamed]

was this paper really difficult or did was it only me who found it difficult?? I am hearing mixed responses. Some are saying that the questions were quite easy

 

[Paula V]

Is it first week after the change or after the first week of change?

I am 100% sure it was the first week after the change

 

[Paula V]

what did you get for the angle one ( something like cosx + 3sinx > 0 ) .. i got < 146 and >326 i think

I think I got something very similar (I got those angles in i) for sure )

 

[Paula V]

was this paper really difficult or did was it only me who found it difficult?? I am hearing mixed responses. Some are saying that the questions were quite easy

It was tricky and harder than a lot of papers, but there were some really easy questions like the first one for example. It was really long, and there were a lot of 6 point questions which were kind of hard (or at least really easy to mess up at) so I think that also makes it seem harder. Plus, I'm guessing a lot of us were stressed during the exam, I know I was, so adding that also makes it seem more difficult. What I did is that I skipped over the ones that took me more than 30 seconds to figure out and came back to them at the end, and the ones that I did in the first go were pretty easy (I still made a few really stupid mistakes for which I'm guessing I'll lose a point from each of those)

 

[_tanyaw]

Also, did anybody see the leaked paper? Was it easier or just as hard?

The leaked paper? Our exam was leaked?

 

[Paula V]

The leaked paper? Our exam was leaked?

yeah, that's why the one that we got was dark yellow, it was a backup paper

 

[Bai fong]

i believe the paper was not that hard, if you worked through all past exams , you will find that most of the questions given were asked before. However i do agree that it was a lengthy paper, 11 numbers were too much but 10 would be fine.
Anybody else find that the marks allocated were also quite unfair?

 

[Tauqir_hamed]

I agree with you.. Is n=12 or n=13 in the geometric series. most are saying 12.. i put in 12 and got something like 9900 and 107000 if i recall correctly

i believe the paper was not that hard, if you worked through all past exams , you will find that most of the questions given were asked before. However i do agree that it was a lengthy paper, 11 numbers were too much but 10 would be fine.
Anybody else find that the marks allocated were also quite unfair?

 

[dwightedknight]

I agree with you.. Is n=12 or n=13 in the geometric series. most are saying 12.. i put in 12 and got something like 9900 and 107000 if i recall correctly

If you see many past papers, you'll find that marks will be most likely be awarded for all n = 11, 12, 13. Stop worrying.

 

[Tauqir_hamed]

If you see many past papers, you'll find that marks will be most likely be awarded for all n = 11, 12, 13. Stop worrying.

oh . thats a big relief
also, in the question where we had to prove that the line y= x intersects the tangent ( or something similar ) . I found out the points to be ( 2, 4 ) ( 6, 4 ) .. then , i made a silly mistake in differentiating y.. and thus, while i did calculate the slope and equations of the tangents , they won't be correct since i got the differentiating part wrong. How many marks do you think will I be awarded out of 6 ?

 

[Asher*]

Hi all,
I took the AS Math (9709/12) exam last week.

My answers were as follows; (I got most of the things right (they matched with others), a thing or two were maybe incorrect, also can someone grade my paper? ty ). The exam was mostly straightforward, I'd say a bit more difficult than m/j 2017 though, Expect the threshold to be at around 58 - 62.

Binomial Expansion
(i) a=3

Quadratics
(i) k>9
(ii) k = 11 (tangent)

Series
a = 8000; r = 1.02
(i) T12= 9950 (or EQ)
(ii) S12 = 107000 [I wrote my answer as 107300, would a mark be deducted?]

Trig Function (cosine)
f (x) = - a + bcosx
(i) a = 7, b = - 4
(ii) k>3 AND k<11

Vectors
(i) People have already posted the answers for the vectors CA & DA, also I don't remember them
(ii) Angle CAD = 34.7 (this is the correct answer)

Circular Measure
(i) It was a "show that" question, I'm assuming most of you got it right (so did I)
(ii) Area = 87.8

Coordinate Geometry
(i) h = 2 & k = 36 [MP was (14,10) not (12,10)]

Differentiation/Integration
(i) dy/dx = √4x + 1 ; where c = 1/2 (Equation of line)
(ii) dx/dt = 0.02
(iii) constant = 2

Functions
(i) 25 - 2(x+3)^2 [Completing the square]
(ii) Stationary Point (-3, 25)
(iii) k = -3
(iv) g^-1(x) = (25-x/2)^1/2 -3

Trigonometry
(i) - 2sinx + 3cosx =0
= -33.7, Solutions = 146.3, 326.3
(ii) Sketching was pretty straightforward
(iii) The answer to this question was already there in the first part x< 146.3 AND x<326.3 [I, unfortunately, got this one wrong, I wrote x>90 and x>146.3, 326.3? lol ik zero there]

Integration
(i) y = x was easily proved, (3=3)
(ii) Volume = 32/3 pi

Good luck for S1/M1 folks!

 

[dwightedknight]

oh . thats a big relief
also, in the question where we had to prove that the line y= x intersects the tangent ( or something similar ) . I found out the points to be ( 2, 4 ) ( 6, 4 ) .. then , i made a silly mistake in differentiating y.. and thus, while i did calculate the slope and equations of the tangents , they won't be correct since i got the differentiating part wrong. How many marks do you think will I be awarded out of 6 ?

I am not sure but differentiation is most likely worth 1 or 2 marks. Also, an accuracy mark would be lost. So most likely you will get 4 or 5 marks. (provided you did find the intersection of the tangents correctly)

 

[dwightedknight]

Hi all,
I took the AS Math (9709/12) exam last week.

My answers were as follows; (I got most of the things right (they matched with others), ill include the correct answers of the few Q's I got wrong, also can someone grade my paper? ty ). The exam was mostly straightforward, I'd say a bit more difficult than m/j 2017 though, Expect the threshold to be at around 58 - 62.

Binomial Expansion
(i) a=3

Quadratics
(i) k>9
(ii) k = 11 (tangent)

Series
a = 8000; r = 1.02
(i) T12= 9950 (or EQ) [I too, took n as 13 [(cuz it said, the 12th week after the first week, so I did 12+1, oh well) but my ratio was correct, so I guess I'll get 1 mark for that]
(ii) S12 = 107000 [I took n as 12 in part ii lolz, but I wrote my answer as 107300, would a mark be deducted?]

Trig Function (cosine)
f (x) = - a + bcosx
(i) a = 7, b = - 4
(ii) k>3 AND k<11 [I messed this one up, i wrote k =3 and did a little bit of working, would I be given any credit?]

Vectors
(i) People have already posted the answers for the vectors CA & DA, also I don't remember them
(ii) Angle CAD = 34.7 (this is the correct answer)

Circular Measure
(i) It was a "show that" question, I'm assuming most of you got it right (so did I)
(ii) Area = 87.8

Coordinate Geometry
(i) h = 2 & k = 36 [MP was (14,10) not (12,10)]

Differentiation/Integration
(i) dy/dx = √4x + 1 ; where c = 1/2 (Equation of line)
(ii) dx/dt = 0.02

Functions
(i) 25 - 2(x+3)^2 [Completing the square]
(ii) Stationary Point (-3, 25)
(iii) k = -3
(iv) g^-1(x) = -3 +-√25-x/2

Trigonometry
(i) - 2sinx + 3cosx =0
= -33.7, Solutions = 146.3, 326.3
(ii) Sketching was pretty straightforward
(iii) The answer to this question was already there in the first part x< 146.3 AND x<326.3 [I, unfortunately, got this one wrong, I wrote x>90 and x>146.3, 326.3? lol ik zero there]

Integration
(i) y = x was easily proved, (3=3)
(ii) Volume = 32/3 pi

Good luck for S1/M1 folks!

My answer to binomial expansion, integration and dif