expected grade boundries for As math p12

[guest1234]

Okay yes, now I remember the answer. CD was ( -8 -4 8) and since OC was ( 4 5 6) then OD was ( -4 1 14)

No, OD was (12, 9,-2). For CD, you had to consider the vector in the direction of BA, not AB. Hence, OC was (8 4 -8) and you add up OC and CD to get the position vector of OD.

 

[thementor]

No, OD was (12, 9,-2). For CD, you had to consider the vector in the direction of BA, not AB. Hence, OC was (8 4 -8) and you add up OC and CD to get the position vector of OD.

First of all that is axiomatically wrong. I'll agree that you had to consider BA but OC was ( 4 5 6) NOT ( 8 4 -8)

 

[guest1234]

First of all that is axiomatically wrong. I'll agree that you had to consider BA but OC was ( 4 5 6) NOT ( 8 4 -8)

Sorry, I meant that CD was (8 4 -8), not OC.

 

[thementor]

Sorry, I meant that CD was (8 4 -8), not OC.

Ah yes. That's true. So if I did that wrong but part of the method was correct, how many marks do you think I could loose?

 

[guest1234]

Ah yes. That's true. So if I did that wrong but part of the method was correct, how many marks do you think I could loose?

You should not lose more than 1.

 

[thementor]

You should not lose more than 1.

oh good. But I'll still assume I loose 2
Do you remember what the second part of the second last question asked?

 

[guest1234]

oh good. But I'll still assume I loose 2
Do you remember what the second part of the second last question asked?

Eq. of tangent at x = 3 on the given curve: y = 0.5x + 5.5

 

[Snowysangel]

yes Q2 (I)(a) was sin p= -sqrt(1-k^2)
and tan p was -(sqrr(1-k^2))/p
and sin2theta will be negative becoz sin theta will be negative and cos will be positve so sin times cos will always give a negative answer. This question could have been done very easily by those who have studied p3

I just realized that I forgot to put the negative sign. How many marks was q2 for?

 

[Princess Raven]

can somebody post the answer and the working of question 1 and q 9 plz

 

[guest1234]

yes Q2 (I)(a) was sin p= -sqrt(1-k^2)
and tan p was -(sqrr(1-k^2))/p
and sin2theta will be negative becoz sin theta will be negative and cos will be positve so sin times cos will always give a negative answer. This question could have been done very easily by those who have studied p3

I had a very strong temptation to solve the sin 2theta question that way, but then chose the "P1 style", with full elaboration though. P3 methods reserved for 20th May.

 

[Silverglitter]

Wow good job!!

59-60. Some different questions. Expected it to be easier. Will prolly get around 65-66.

 

[uzair shahid]

that vector question part 2 took like 20mins of my time but got the right answer in the end.
but still managed to finish before time. was good alhamdulillah

 

[uzair shahid]

I am impressed by your memory , but my answer was 8 ,1,8 and I am pretty surr about the number I dont remember sign

look vector ba was 2 1 2
so the ratio must be same for parrallel vector cd

bro vector od must be oc + cd u just calculated cd i think

 

[Princess Raven]

bro vector od must be oc + cd u just calculated cd i think

Do u rmr how many marks was the vector question?

 

[uzair shahid]

Do u rmr how many marks was the vector question?

part 2 was 4 marks the first one was i think 3 marks

 

[Princess Raven]

Phew okay ATLEST not 6 or 8 marks.. I just did ba is parallel to cd and cd is 4 times longer I had no time to complete..
U think I'll get 2 out of 4?

part 2 was 4 marks the first one was i think 3 marks

 

[RawanKhalid]

Nope I'm talking about getting an A in AS not Alevel as I take only Pure and mechanics1

Easily, my friend had a C in p1 B in M1 And high As in s1 and p3 ended up with A

 

[RawanKhalid]

Guys is it okay that I solved more than one question in one page? But I wrote the number of questions next to each one? Please reply

 

[GCE As and a level]

https://www.xtremepapers.com/community/threads/chemistry-9700-p21-gt.33403/#post-770300

GUYS VOTE HERE ABOUT YOUR EXPECTATIONS FOR CHEMISTRY ''GT'' P21

 

[SherlockHolmes221B]

Guys is it okay that I solved more than one question in one page? But I wrote the number of questions next to each one? Please reply

I have been told that every question has to be on a single page. InShaaAllah the examiner won't be tough on you. Just pray c: