how was amath paper 2?
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- the paper has one of the hardest binomial expansion qn i've ever seen
- the qn about differentiation, integration, maxima and minima dropped like a bomb with 11 marks.
conclusion - hard!
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my fren say easyyy
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binomial is manageable..albeit hard.
{11} m intergration should be correct
Paper is manageable........
To yiha093: For u confirm easy one =)
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Originally posted by SBS n SMRT:
binomial is manageable..albeit hard.
{11} m intergration should be correct
Paper is manageable........
To yiha093: For u confirm easy one =)
i dun take am dummy =X
slacking at home reading manga all day.
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Originally posted by yiha093:
i dun take am dummy =X
slacking at home reading manga all day.
yah, i know u dun take amath, but for u easy right
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haha.. cracked my brain at last 15min still cannot figure out 2nd and 3rd part of binomial. Overall still ok.
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How to do plane geometry!!!! Stare 30mins also duno how to do... If got circle I still may know how to do, but there only isosceles triangle sia... the binomial i got the n and a but my b wrong...
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plane geo is by congruent triangles or by intercept theorem
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i feel that this paper is overall easy, the question 5 was tricky but can be managed
i died by leaving imaginary number for question 3 -.-
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the common method is to prove the congruent triangles AQB an BPA
i had almost gotten it but i overlooked the common sides, AB =.=
8 marks had flown away....taking away some of our chances of getting A1 for amath.
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Originally posted by qdtimes2:
the common method is to prove the congruent triangles AQB an BPA
i had almost gotten it but i overlooked the common sides, AB =.=
8 marks had flown away....taking away our chances of getting A1 for amath.
dun worry man, the a1 is maybe like 85% or so..
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Originally posted by SBS n SMRT:
yah, i know u dun take amath, but for u easy right
ya lor. O lv grade 0 . dun playplay
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Originally posted by ViewtyKU990:
i feel that this paper is overall easy, the question 5 was tricky but can be managed
i died by leaving imaginary number for question 3 -.-
never put i for log qns.......
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not log, is the other part whereby they already call us prove on top already. log part i got correct answer, but i got 2 extra answer [-3+-(11i)]/2
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Originally posted by SBS n SMRT:
never put i for log qns.......
what do u mean?
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For the binomial question, simply understanding why they gave us a + bx^2 instead of a + bx + cx^2 would get you the last 6 marks of the question.
I was literally thanking the heavens for being born in the year 1993. I thought that the 2008 O' Level paper was so easy and I wished I was born in the year 1992. Not any more.
Look at the geometrical proofs question. You could solve it without any advanced theorems; simple Emaths knowledge would do it.
The calculus question was simply free 11 marks.
It was a terrible easy paper. One of the two easiest papers from 1999 - 2009, the other being 2008.
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That aside, I left 14 marks worth of questions blank.
Similar to the previous 3 mathematics papers, I had poor time management. Well, I never really planned my time to begin with, so I had NO time management.
"We didn't lose the game, we just ran out of time."
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Originally posted by qdtimes2:
what do u mean?
i = square root of -1 = imaginary no
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Originally posted by SBS n SMRT:
i = square root of -1 = imaginary no
yeah lols i 4got that we didnt learn that in o.. but cambridge will still mark correct or?
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Originally posted by Dejomel:
The calculus question was simply free 11 marks.
I think most of you still dun realise that you lost 2 marks.
I will bet my underwear that most people did d2y/dx2 =0 and think it is sufficient proof that it is a point of inflexion. Unfortunately it is not.Visualise the graph of y = x^4
dy/dx = 4x^3
when dy/dx = 0
4x^3=0
x=0
d2y/dx2 = 12x^2
d2y/dx2 = 12(0)^2
d2y/dx2 = 0
Now look at your mental picture of y = x^4, is the turning point a point of inflexion?
To prove point of inflexion, you need to use the outline method.
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i do the sign test thingy leh
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i spelt inflexion and inflexation!
will they be lenient? -
lol. the most -1 lor.
and a1 is like around 80%. not as high as 85% -
Originally posted by Mikethm:
I think most of you still dun realise that you lost 2 marks.
I will bet my underwear that most people did d2y/dx2 =0 and think it is sufficient proof that it is a point of inflexion. Unfortunately it is not.Visualise the graph of y = x^4
dy/dx = 4x^3
when dy/dx = 0
4x^3=0
x=0
d2y/dx2 = 12x^2
d2y/dx2 = 12(0)^2
d2y/dx2 = 0
Now look at your mental picture of y = x^4, is the turning point a point of inflexion?
To prove point of inflexion, you need to use the outline method.
it is for sure inflexion, and is and cubic curve not a X^4 curve btw..
x | 0.99 | 1 | 1.01
dy/dx | >0 | 0 | >0
sketch | / | _ | /
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Originally posted by forum-er93:
lol. the most -1 lor.
and a1 is like around 80%. not as high as 85%Last year, I had 2 students who reported a score of 86% after checking their answers against answers I provided. They both got A2.
This year's paper is only barely just a teensy bit harder... So 85% is a good guage.
Considering more than a third my students lost 25-30 marks this year... I would hope that 80% is the cut off for A1 but I wouldn't hold my breath.
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Originally posted by ViewtyKU990:
it is for sure inflexion, and is and cubic curve not a X^4 curve btw..
x | 0.99 | 1 | 1.01
dy/dx | >0 | 0 | >0
sketch | / | _ | /
I know and you did it the correct way congratulations.
I was simply using the x^4 curve to illustrate why d2y/dx2 =0 does not prove that the turning point is a point of inflexion.