How did Maths 12 go? No discussion

[BhaiArshad]

Paper was leaked after exam last year too so nothing to worry about

There is news circulating that school has been told about rescheduling date.

 

[Ram97]

There is news circulating that school has been told about rescheduling date.

 

[Abdel Moniem]

farhan141 what if i forgot to factor out the 6 when i got the 2 out in q11) how many marks will i loose?

 

[psychiatrist]

Correct Answers (Joint Answers By Me and Aly).

Note: Question order may be wrong.

Q1) C = 8 And then arrange equation according to that.

2) area of shaded region= r^2(pie/2 -theta + sin2theta/2)

3) x^2= 240 x^3= -160 then 560x^3

4) u=6

5) theta= 71.4 and 63.7 (around these values)

6)i) 120m ii) pie/15 iii) 10<t<20

7) 2y=x-13 (idk the exactly value in replacement of 13) ii) C (9,7)

8)i) 459 ii)k=6 iii)S=54

9)i) 31.8 ii) 1/6 * (4i-2j+4k) iii) same magnitude for isosceles of OC and OA

10)i) 16pi/3 ii) i guess c was 2.5 and -3.5

11)i) p>0.5 ii) 2(x-1.5)^2 +0.5 iii) g(x)>=1/2 (iv) k=1.5 v)h inverse= 3/2 + underroot((2x-1)/4)

q7 part i its 2y = 3x - 13

 

[farhan141]

There is news circulating that school has been told about rescheduling date.

All rumors from students whose paper went bad

 

[farhan141]

farhan141 what if i forgot to factor out the 6 when i got the 2 out in q11) how many marks will i loose?

Just 1 I think

 

[Abdel Moniem]

Just 1 I think

The problem is that i used that completing the square form in the next questions, will i loose 9 marks or will the error be carried forward?

 

[farhan141]

The problem is that i used that completing the square form in the next questions, will i loose 9 marks or will the error be carried forward?

U will get 1 mark in each part if u carried it forward. So total of like 6 marks lost I believe

 

[Abdel Moniem]

U will get 1 mark in each part if u carried it forward. So total of like 6 marks lost I believe

I hope that's right.

 

[omaaaar]

Here is the link to the solved paper of maths 12 on just papers
http://justpastpapers.com/cie-9709-pure-mathematics-paper-12-mayjune-2015-answers/

 

[farhan141]

To

Here is the link to the solved paper of maths 12 on just papers
http://justpastpapers.com/cie-9709-pure-mathematics-paper-12-mayjune-2015-answers/

Unfortunately their Q.2 is completely wrong lol.

1/2 r^2sinTheta = r^2sinTheta. Nice logic just papers... Solving AB by cosine rule when u could take radius rsinTheta..

 

[Abdel Moniem]

according to the answers i lost 14-17 marks in P1, is it still possible to get an A* or even an A in maths A level?

 

[farhan141]

according to the answers i lost 14-17 marks in P1, is it still possible to get an A* or even an A in maths A level?

Yes score good in M1 (Above 40)

 

[psychiatrist]

Yes score good in M1 (Above 40)

How to do question 6?
I am very well with differentiation, but the questions like this kills me

 

[Komail Sabba']

Here is the link to the solved paper of maths 12 on just papers
http://justpastpapers.com/cie-9709-pure-mathematics-paper-12-mayjune-2015-answers/

Q8 part ii is wrong as well.
S= a/(1-r) not r-1
and they substituted the value of k instead of r..

 

[R_Ma7mooD]

I guess I did many questions correctly, messed up Q10 and c coordinate question, and the one which was 6 marks. I did the stupidest mistake of my life in the binomial's answer... I added instead of subtracting (forgot 160 was negative) got 880 so thats another mark lost.
hmmm my paper didnt go quite as expected, but lets hope for the best.
(guys if I get a B in AS can I raise it to an A* on A levels?)

 

[yoyo00xx]

Q8 part ii is wrong as well.
S= a/(1-r) not r-1
and they substituted the value of k instead of r..

the C values are wrong for him

 

[Yousif Ahmed]

Hi guys
In Q6)ii) , I got only cos(kt)=1 , so how much marks I will get?
For Q6)iii) I got t=10 only , so how much marks I will score in this part?
In Q7)i) , I got m=-2/3 but I forgot to divide -1/m , so how many marks I will lose?
In Q7)ii) I got the equation 2y=3x-13 but the C coordinates wrong, show many marks I will lose?
In case of Q8)b)i) , I got K=3 & I used this k value for Part ii) , will I get some follow through method marks?
In Q10)ii) , I found dy/dx only , so how many marks I would score here ?
Finally , in Q11)iii) , I got the range 5<= f(x) <= 13 , will I score marks here

 

[farhan141]

Hi guys
In Q6)ii) , I got only cos(kt)=1 , so how much marks I will get?
For Q6)iii) I got t=10 only , so how much marks I will score in this part?
In Q7)i) , I got m=-2/3 but I forgot to divide -1/m , so how many marks I will lose?
In Q7)ii) I got the equation 2y=3x-13 but the C coordinates wrong, show many marks I will lose?
In case of Q8)b)i) , I got K=3 & I used this k value for Part ii) , will I get some follow through method marks?
In Q10)ii) , I found dy/dx only , so how many marks I would score here ?
Finally , in Q11)iii) , I got the range 5<= f(x) <= 13 , will I score marks here

Wait till August

 

[omaaaar]

To
Unfortunately their Q.2 is completely wrong lol.

1/2 r^2sinTheta = r^2sinTheta. Nice logic just papers... Solving AB by cosine rule when u could take radius rsinTheta..

Q8 part ii is wrong as well.
S= a/(1-r) not r-1
and they substituted the value of k instead of r..

Ya I know some of their solutions are wrong even the angle in the vector question is wrong but I just posted the link so that if someone wants to check his other answers and see how many marks he has lost so that he can make up for it in other pprs