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

[Asher*]

the question where they asked us to find k such that 7-4cos(x)=k has no solutions... will i get the mark if, instead of drawing a graph, i rearrange it to cos(x)=(7-k)/4 and then solve the two inequalities (7-k)/4<-1 and (7-k)/4>1 to obtain the correct answers?

You really didn't had to sketch a graph for that question, the way you did it too, is correct

 

[DudeWithoutName]

You really didn't had to sketch a graph for that question, the way you did it too, is correct

Thank you very much

 

[xoxoxoxo123276]

I got the volume of the last part as 104/3pi is that correct?

 

[hellodjfos;s'ff]

I got h as 3 and k as 25

U correct 100%. The other guy is wrong

 

[hellodjfos;s'ff]

binomial, a = 3
k<9 and k = 11

a = 8000 , r = 1.02

h= 1 k =22

a = 7 b= -4 , for no solution k > 7 , and k < 3

x = 146 , 323
range for which 2cos > -3sin , 0 >x> 146

yup the range was 0 till 146 and 323 till 360. Your answers for no solution is slightly incorrect. k<3 but your k>7 is wrong. The answer was k<3 and k>11. Try doing it again.
F(x) = 4cox+7
and f(x)=k has no solutions

 

[hellodjfos;s'ff]

Maths qp12 was very easy, medium prep and a bit of thinking could've got you full marks. The toughest question was the one I mentioned above, the f(x)=k has no solutions

 

[hellodjfos;s'ff]

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) = (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!

This dude here is right. All answers are spot on, i am sure these are the answers as I cross checked my answers with all my smart friends and got these.

 

[hellodjfos;s'ff]

I got the volume of the last part as 104/3pi is that correct?

32pi/3.
It was 64pi-160pi/3 = 32pi/3

 

[hellodjfos;s'ff]

Asher's long post contains the correct answers. All answers are spot on, i am sure these are the answers as I cross checked my answers with all my smart friends and got these.

 

[Annabelle_xx]

Please how do I get these questions I need p11 and P12 I am writing in October/November

 

[Annabelle_xx]

Can I get a reply pls?

 

[Paula V]

Please how do I get these questions I need p11 and P12 I am writing in October/November

You’ll have to wait a while because we just gave this exam less than a week ago. I think the papers will be published after we get our results in August.

 

[Annabelle_xx]

Oh... Thanks anyway

You’ll have to wait a while because we just gave this exam less than a week ago. I think the papers will be published after we get our results in August.

 

[Asher*]

Asher's long post contains the correct answers. All answers are spot on, i am sure these are the answers as I cross checked my answers with all my smart friends and got these.

Did you get all of them right? gg, I too was aiming for full marks lol (as I did practice A LOT), I just dk how I did those silly mistakes, and btw h = 2 and k = 36, not 3/25.

 

[Asher*]

You’ll have to wait a while because we just gave this exam less than a week ago. I think the papers will be published after we get our results in August.

Pictures of the exam script surfaced on this facebook group like the day after, here the link: https://www.facebook.com/groups/302892556809834/ (Its a closed group, you'd have to wait a bit before you get accepted in)

 

[Rahayb]

Did you get all of them right? gg, I too was aiming for full marks lol (as I did practice A LOT), I just dk how I did those silly mistakes, and btw h = 2 and k = 36, not 3/25.

Does anyone remember the whole question for this h and K ?I wanna solve it again heheh

 

[hellodjfos;s'ff]

Did you get all of them right? gg, I too was aiming for full marks lol (as I did practice A LOT), I just dk how I did those silly mistakes, and btw h = 2 and k = 36, not 3/25.

Yea, got them all correct. I did get h=2 and k=36

 

[Babish Man Shrestha]

NO man. It took my all and I left abot 4 questions with 20 marks lost/

They too found it difficult. Did you finish the whole exam paper before time?

 

[Babish Man Shrestha]

It took my all and I left abot 4 questions with 20 marks lost

 

[Babish Man Shrestha]

If any one has any leaked paper then please send me too.
Stat is coming near and I got nothing .