Mathematics: Post your doubts here!

[abbey789]

I have t
i found the full paper with answers in a site for math and stats unfortunately i cant uploade because the owner of the site said do not copy but fortunately i can pm u the site if u want

PM it to me too

 

[AbbbbY]

who can solve this question ?

x = 2*2^0.5
y= -2

Complex Numbers working is tough to show, so I'll simply tell you how it's to be done. Pretty easy question.

Substitute w=x+iy in both sides and expand
Then compare both sides (imaginary and real).

 

[princess787]

heyy! cn sum1 please help me with nov 2011 paper 1 question 7 i) variant 1??
i simply added all the lengths n got 6y+8x=48 ...... bt d ms is sayin sumthing different.. sumthing like y=1/6(48-8x)... how???????????? please help! thanx in advance!! :*

 

[AbbbbY]

heyy! cn sum1 please help me with nov 2011 paper 1 question 7 i) variant 1??
i simply added all the lengths n got 6y+8x=48 ...... bt d ms is sayin sumthing different.. sumthing like y=1/6(48-8x)... how???????????? please help! thanx in advance!! :*

y= 1/(6(48-8x) is the same thing as y = (48-8x)/6 which is the same thing as 6y+8x=48

1/(6(48-8x) and (48-8x)/6 are both acceptable but the third one is not because it asks for y = ...

It's like writing x^-1 and 1/x; essentially the same thing so both correct even if the marking scheme mentions either one.

 

[fahaddewan]

I need help with this S1 probability problem. See the attached file.

 

[AbbbbY]

I need help with this S1 probability problem. See the attached file.

No file attached...

 

[fahaddewan]

Please check agen . I reattached it. Thanks.

 

[autumnsakura]

http://papers.xtremepapers.com/CIE/...S Level/Mathematics (9709)/9709_w09_qp_71.pdf
Need help with question 7 part 2. I don't get why they don't square the constant 2 for cola but square the constant 1/2 for tonic water.
Btw, can anyone explain why some constant for variance is squared and some isn't. I know it's something to do with sum and total but sometimes the question isn't really clear whether it's sum or not. THANKS!!!

 

[minie23]

The point P,Q,R have coordinates (3,-1),(2 5) n (8 3) respectively. Find the equation of the straight line joining P to the midpoint of QR

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Plz work it out n gve me the answr plz thx in advance

 

[minie23]

The point P,Q,R have coordinates (3,-1),(2 5) n (8 3) respectively. Find the equation of the straight line joining P to the midpoint of QR

​

Plz work it out n gve me the answr plz thx in advance

 

[LindaKim123]

Hey please help me in http://papers.xtremepapers.com/CIE/...S Level/Mathematics (9709)/9709_w12_qp_71.pdf

question 2 & question 4!! please!

and, if you can summarize the hypothesis part, I would really appreciate it!!

 

[cross]

Does anybody here have Paper 72? S2? I really need some help there!

 

[LindaKim123]

Does anybody here have Paper 72? S2? I really need some help there!

I am and I'm so depressed... because I didn't get the hypothesis part...

 

[cross]

I am and I'm so depressed... because I didn't get the hypothesis part...

Wait, your exam is done? What variant are you?

 

[LindaKim123]

Wait, your exam is done? What variant are you?

No no no I mean, I didn't really get how to do the hypothesis part, and I have exam tmrw, so I'm really depressed..

 

[cross]

No no no I mean, I didn't really get how to do the hypothesis part, and I have exam tmrw, so I'm really depressed..

Oh, so yeah we basically have the same exam, and the same reason to be depressed. However, I'm not that bad at hypothesis so I can have a go at helping with the question that's troubling you

 

[LindaKim123]

Oh, so yeah we basically have the same exam, and the same reason to be depressed. However, I'm not that bad at hypothesis so I can have a go at helping with the question that's troubling you

haha yeah! Oh really??
Can you do this question ??

http://papers.xtremepapers.com/CIE/...S Level/Mathematics (9709)/9709_w12_qp_71.pdf

question 2 & question 4!! please!

and, if you can summarize the important point to remember for the hypothesis part, I would really appreciate it!!

 

[cross]

 

[cross]

haha yeah! Oh really??
Can you do this question ??

http://papers.xtremepapers.com/CIE/...S Level/Mathematics (9709)/9709_w12_qp_71.pdf

question 2 & question 4!! please!

and, if you can summarize the important point to remember for the hypothesis part, I would really appreciate it!!

and here's Question 4

 

[LindaKim123]

and here's Question 4View attachment 27924

Oh my God!!! Thank you sooooo much!! I totally understood it! you are so good and the way you arranged and wrote the point just so neat and easy to read!!
You are the BEST!!