2011
Tue
1
Nov

# GCE O Level Oct/Nov 2011 A-Maths 4038 Paper 2 Suggested Answers & Solutions

(27)
Posted at 3:43 pm

The day began with an innocent attempt at a prophetic tweet.

Only for it to be shot down soon after.

And so in a bright sunny binary day of 1/11/11, Captain Loi and her crew of sexy air stewardesses took off from The Temple to fly Jφss Sticks Airways Flight JS296 among the clouds once more – looking down at a million faces that seemed to bask in the (resigned) relief of the afternoon sun …

… following which the latch was pulled and the package released …

Click the button (if you haven’t yet done so) and grab it here!

• 1.1: Changed all the “Factor Theorem” to “Factor Formula” in Q10 which Miss Loi had written mistakenly in her haste

For those who might be feeling a bit down after this year’s “more-challenging-than-usual” A-Maths papers, be comforted to know that the evil bell curve should be working in your favour (instead of against you) this time.

Hope you can take heart from the following Singlish-ridden quote which Miss Loi has always said to downcast students in times of need (while patting their backs simultaneously) …

If everyone says difficult and you say die then it’s ok.
But if everyone says easy and you say die then you REALLY DIEEEEEE!

Let the burning of Math books begin! But please don’t accidentally burn your books from other subjects

Good Luck for the Rest of Your Papers!!!

Meanwhile last-minute air-drops cum tips for other O Level subjects are still continuing on the Jφss Sticks Facebook wall!

### Revision Exercise

To show that you have understood what Miss Loi just taught you, you must:

1. Kenny @kenny070287 says

2011
Nov
1
Tue
5:07pm

1

The a maths paper 2 is ok... can get full mark if i am not wrong, seeing that there is only a tangent graph, which kill a lot

• 2011
Nov
2
Wed
11:54am

1.1

@Kenny: Congrats!

Yes that tangent graph's been waaaaaay overdue - every year Miss Loi was thinking "This must be the Year of the Tangent!" only to be pang seh-ed by it again and again

2. NeedHelp says

2011
Nov
1
Tue
6:55pm

2

Hi i would like to ask about the solution to 11 part 3 if it is possible to show that the line is a tangent to the circle by equating equations of both and obtaining a quadratic equation and hence prove that D = 0 ?

• 2011
Nov
2
Wed
11:52am

2.1

Umm ... for a proving question like this, you're supposed to prove directly, instead of using the final 'proof' as part of your workings to attain your proof (this is beginning to sound zen-like ...) as you've done.

3. Lala says

2011
Nov
1
Tue
10:55pm

3

Would it be safe for me to assume that they will minus at most 3 marks for the differentiation Qn for the one with the lawn, if the value of r happen to be wrong?
Because my dP/dr is correct and my d2P/dr2 is also correct.... >< should have at least one mark each right?

• 2011
Nov
2
Wed
11:46am

3.1

@Lala: For Q6(iii), assuming that your mistake is only limited obtaining and substituting the wrong value for r, you should get be able to get at least 2 marks since the bulk of the 5 marks should go toward the derivation of dP/dr (and acknowledging P has a stationary value when dP/dr =0) plus your second derivative test - which your workings have to reflect clearly.

4. BOB says

2011
Nov
3
Thu
11:10pm

4

Hey Ms Loi, i know its virtually impossible to predict the moderation of O level papers. But i hope u can use ur awesome prediction skills and past experience to help me in something. Do u think that the A1 for this Amath paper (paper 1 + paper 2 combined) this year would be around at most 70% judging by the difficulty?? Please reply. I need some closure over this matter

• 2011
Nov
4
Fri
10:21pm

4.1

@BOB: While as you rightly pointed out that it's virtually impossible to predict, Miss Loi can say with a certain amount of certainty that any moderation being done would almost always be pulling the base A1 mark of 75 upwards (towards 80) instead of downwards (towards 70).

Hopefully this will bring some form of closure to you *gives a squeezy hug*

### 19 Reactions

1. Miss Loi tweeted

2011
Nov
1
Tue
7:46am

5

O Level 2011 Amaths Paper 2 solutions air-dropped: http://t.co/BT0jrY0C #amath #olevel

2. Miss Loi tweeted

2011
Nov
1
Tue
8:07am

6

O Level 2011 Amaths Paper 2 solutions air-dropped: http://t.co/BT0jrY0C #amath #olevel

3. Miss Loi tweeted

2011
Nov
1
Tue
8:18am

7

@hahahaannpeng Tally them here: http://t.co/BT0jrY0C

4. taeclara tweeted

2011
Nov
1
Tue
8:24am

8

O Level 2011 Amaths Paper 2 solutions air-dropped: http://t.co/BT0jrY0C #amath #olevel

5. Clarice tweeted

2011
Nov
1
Tue
8:25am

9

O Level 2011 Amaths Paper 2 solutions air-dropped: http://t.co/BT0jrY0C #amath #olevel

6. 2011
Nov
1
Tue
8:25am

10

RT @MissLoi: @hahahaannpeng Tally them here: http://t.co/bp5ihXIL

7. Ong Aaron tweeted

2011
Nov
1
Tue
8:28am

11

O Level 2011 Amaths Paper 2 solutions air-dropped: http://t.co/BT0jrY0C #amath #olevel

8. Sixian. tweeted

2011
Nov
1
Tue
8:32am

12

O Level 2011 Amaths Paper 2 solutions air-dropped: http://t.co/BT0jrY0C #amath #olevel

9. whimsical tweeted

2011
Nov
1
Tue
8:33am

13

O Level 2011 Amaths Paper 2 solutions air-dropped: http://t.co/BT0jrY0C #amath #olevel

10. Sean Lim tweeted

2011
Nov
1
Tue
8:37am

14

O Level 2011 Amaths Paper 2 solutions air-dropped: http://t.co/BT0jrY0C #amath #olevel

11. Jingyuan tweeted

2011
Nov
1
Tue
8:59am

15

O Level 2011 Amaths Paper 2 solutions air-dropped: http://t.co/BT0jrY0C #amath #olevel

12. 2011
Nov
1
Tue
9:10am

16

O Level 2011 Amaths Paper 2 solutions air-dropped: http://t.co/BT0jrY0C #amath #olevel

13. Kaleh :) tweeted

2011
Nov
1
Tue
10:37am

17

O Level 2011 Amaths Paper 2 solutions air-dropped: http://t.co/BT0jrY0C #amath #olevel

14. Sixian. tweeted

2011
Nov
1
Tue
11:35am

18

@LizhuYOOOOOONA RT @MissLoi: O Level 2011 Amaths Paper 2 solutions air-dropped: http://t.co/iRXaxNLf #amath #olevel

15. J tweeted

2011
Nov
1
Tue
12:01pm

19

@LizhuYOOOOOONA RT @MissLoi: O Level 2011 Amaths Paper 2 solutions air-dropped: http://t.co/iRXaxNLf #amath #olevel

16. 2011
Nov
1
Tue
12:03pm

20

O Level 2011 Amaths Paper 2 solutions air-dropped: http://t.co/BT0jrY0C #amath #olevel

17. Miss Loi tweeted

2011
Nov
1
Tue
12:41pm

21

The O Level 2011 Amaths Paper 2 solutions air-dropped: http://t.co/BT0jrY0C #amath #olevel

18. Tania Chang tweeted

2011
Nov
1
Tue
12:57pm

22

@chickennuhget RT @MissLoi: The O Level 2011 Amaths Paper 2 solutions air-dropped: http://t.co/PzdF22mc #amath #olevel

19. lepakingking tweeted

2011
Nov
1
Tue
2:09pm
• ### Latest News

The completion of the Second Temple is nigh!

Just in time for the June Holiday Intensive Jφss Sticks tuition sessions to save EMaths, AMaths, Chemistry, Physics & Social Studies students who may be still reeling from their "满江红" mid-year exam results :\

Contact Miss Loi to confirm your salvation and rid yourself of the LMBFH Syndrome from the subject(s) of your choice this June holiday!

Subscribe to Miss Loi's 2012 Maths Exam Papers now, with a subscription period that lasts right up till 31 Dec 2013!

Suggested solutions & answers to selected Oct/Nov 2012 GCE 'A'/'O' Level Maths (EMaths, AMaths, H1, H2 Maths & Science (Physics, Chemistry, Combined Science) papers are out!

Check out them out here »

* Please refer to the relevant Ten-Year Series for the questions of these suggested solutions.

• ### Study Room Access

• WP Cumulus Flash tag cloud by Roy Tanck and Luke Morton requires Flash Player 9 or better.

More Mathematical Topics →

• ### Greatest Chatterboxes

(of the Month)

Subscribe to:

Miss Loi is a full-time private tutor in Singapore specializing in O-Level Maths tuition. Her life's calling is to eradicate the terrifying LMBFH Syndrome off the face of this planet. For over 22 years she has been a savior to countless students ... [read more]

• ### Gratitudes

You’ve helped me keep afloat amidst the intimidating maths tsunamis that threaten to engulf me - from a perpetually 'last-in-class-for-P5P6-Maths' to a 'lol-I-passed Amath!!' student, and occasionally shocking myself with surprisingly decent maths grades ... [read more]

Lisabelle Tan
Singapore Chinese Girls’ School