Mathematics: Post your doubts here!

[Hamnah Zahoor]

If its 12 then volume was 32 pie /3

i got the same.

 

[Sijanshrestha]

what do you think the grading threshold would be? I'm assuming 53 or 54 is an A and around 47 to 49 is a B.

 

[ba-lock-ey]

here is paper 3, 4 and 6. feb march 2018

Thanks!

 

[ba-lock-ey]

i got the same.

yeesh. I must've done something wrong :/

 

[Hamnah Zahoor]

yeesh. I must've done something wrong :/

(160/3) pi
I cant rememeber but it was something over three anyway.

I guess you forgot to find the volume of the SHADED part...160/3 pi was only volume of curve when rotated.

 

[VinSmoke]

How much marks will i be loosing in the volume question, if i have stated the formula and the limits correctly for the curve and have found the volume of solid formed from line rotated 360° around x axis correctly but have done an arithmetic mistake around last stages of my solution? The question was i guess 6 marks.

 

[A*****]

How much marks will i be loosing in the volume question, if i have stated the formula and the limits correctly for the curve and have found the volume of solid formed from line rotated 360° around x axis correctly but have done a arithmetic mistake around last stages of my solution? The question was i guess 6 marks.

1-2 marks I think

 

[Holmes]

here is paper 3, 4 and 6. feb march 2018

Thanks a lot.

But would you mind telling me where did you get these papeZ?
any sites or sth?
Cause I want these for other subjects too.

 

[A*****]

Thanks a lot.

But would you mind telling me where did you get these papeZ?
any sites or sth?
Cause I want these for other subjects too.

Yes plz and if anyone has chem paper 22 f/m 18 so kindly upload it aswell

 

[cellular_automata]

Thanks a lot.

But would you mind telling me where did you get these papeZ?
any sites or sth?
Cause I want these for other subjects too.

There is a website for examiners where they upload the papers earlier than to the public. I'm guessing some examiner was kind enough to pass it on to the students.

 

[hellodjfos;s'ff]

Maths s18 qp12 was piss easy guys... i expect the thresholds to be like 60 for an A for that paper. If you had medium prep and read the questions properly, you could've got full. The only challenging question was 4(ii) where they asked about what were the set of values for which f(x)=k gives no solution. Even that could've been solved with a bit of thinking

 

[dwightedknight]

Maths s18 qp12 was piss easy guys... i expect the thresholds to be like 60 for an A for that paper. If you had medium prep and read the questions properly, you could've got full. The only challenging question was 4(ii) where they asked about what were the set of values for which f(x)=k gives no solution. Even that could've been solved with a bit of thinking

No it wasn't. Maybe you are just a genius.

 

[A*****]

It is true that it was easy...but still I messed it up

 

[dwightedknight]

It is true that it was easy...but still I messed it up

Congratulations. You are also a genius.

 

[xoxoxoxo123276]

I got the volume of the last part as 64pi - 88/3pi = 104/3pi, is this correct?

 

[hellodjfos;s'ff]

Incorrect, the answer was 32/3 pi

 

[xoxoxoxo123276]

Incorrect, the answer was 32/3 pi

How?

 

[A*****]

Congratulations. You are also a genius.

Wish I was!

 

[Tauqir_hamed]

dont worry guys. I do believe that the threshold will be lower. Definitely lower than 60... it doesnt matter if a few people thought it was easy. THE MAJORITY of the candidates felt it very different and difficult compared to previous papers.. and thats what will make the threshold lower

 

[hellodjfos;s'ff]

How?

It was 64pi - 160pi/3 = 32pi/3. You must have made a mistake in finding the volume of the curve when rotated... most likely that occurred due to the squaring of the equation.