Mathematics: Post your doubts here!

[Saahil Parikh]

Overall threshold for an A would be around 170? Assuming stats is normal and not as weird as this one

 

[Saahil Parikh]

The guy who said paper was very easy.

U wot m8?

 

[Belleflower101]

Paper 3 was crazy >.< .. I watched every video on examsolutions and practiced so many past papers .. I hope the grade threshold will be low :/

 

[bludlynsolja]

u just have to find the binomial expansion up to the x^2 term. I think these other details are just to confuse coz if u look at the answer then it is given till the x^2 term so just a matter of expanding binomially.
Did u try expanding and failed to get the answer?

 

[bludlynsolja]

loll yeah u r right man! Even I had been watching the vids on exam solutions and they were really beneficial but I think I got a bit complacent for this paper after I found mechanics to not be too hard So I have myself to blame really nd I Thot id be the only one who found it hard...
Bt anyways lets just hope and pray that the threshold is lowered.
Best wishes everyone!! I don't believe in luck so won't say best of luck! (;

 

[***amd***]

solve it if you can.
just for practice.

 

[Thought blocker]

solve it if you can.
just for practice.

You seriously don't know?
Consider the triangle ABC. AC = BC = 6, while AB can be found by noting that it is twice the perpendicular distance from A to X, where I'm calling O the centre of the hexagon and X the midpoint of DO. AX will be 3 √3 / 2, so AB = 3 √3.

Now consider the triangle CAX. Crucially, < CAX = arccos (3 √3 / 2 x 6) = arccos (√3 / 4).

Therefore < CAD = arccos (√3 / 4) - 60 (because < DAO is of course 60°), and now we're able to work out the area of sector CAF using its radius of 6. From this we need to take the area of triangle CAD, which by the area sine rule is 3 (6) (sin < CAD). Now you can complete to find the final answer.

 

[priya_sharma]

guyzz i m going nuts becoz i found the paper really easy
either i m goin to get 70+ or i m surely failin.......

 

[Thought blocker]

Nuts?

guyzz i m going nuts becoz i found the paper really easy
either i m goin to get 70+ or i m surely failin.......

 

[priya_sharma]

ya nuts............

 

[Thought blocker]

ya nuts............

All the best.

 

[RoOkaYya G]

i need help
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_s03_qp_3.pdf
Q.6 part ii


RoOkaYya G

Pleaaaaaaaaaaase Help !!

just expand and reach the f(x) given
it wants u to show that x is sufficiently small to knock out the 1 in front in the f(x)
i.e x whn taken as that valud of x...it is enough to be expanded to x^2 so tht it knocks out the 1
so d^2y/dx^2 should be a minimum.

 

[manutd96]

http://papers.xtremepapers.com/CIE/...S Level/Mathematics (9709)/9709_s11_qp_61.pdf

for question 6(i), the upper class boundaries are for example 100 or 100.5?


http://papers.xtremepapers.com/CIE/...S Level/Mathematics (9709)/9709_s13_qp_63.pdf

6(i), upper class boundaries are 40 or 40.5?

they are similar questions, pls help thank you

 

[RoOkaYya G]

http://papers.xtremepapers.com/CIE/...S Level/Mathematics (9709)/9709_s11_qp_61.pdf

for question 6(i), the upper class boundaries are for example 100 or 100.5?


http://papers.xtremepapers.com/CIE/...S Level/Mathematics (9709)/9709_s13_qp_63.pdf

6(i), upper class boundaries are 40 or 40.5?

they are similar questions, pls help thank you

if its continuous take 40 and if discontinuous take 40.5

 

[Belleflower101]

ya nuts............

which variant did you do ?...

 

[priya_sharma]

32

 

[TimBluesWin]

I actually got really nervous for the test in the first hour (I didn't even get whole number answer for the polynomials! When I practiced I usually got whole numbers), so I just do what I can till number 10, skipping numbers if I can't do it. At 3 o' clock I already finished no 10 (of course since I got nervous I skipped tons of numbers), so then I went back to the numbers that I can't do, and magically I suddenly can do most of the questions, including the aforementioned polynomial; I just noticed that I calculated them wrong. (Big thanks to God!) Thankfully when I checked my answers with my friend who studied at another school, (Yep they also took exam at the same centre as me), many of the answers were similar to one another... I was really careless on the trapezium rule though, and also the first part of the vector I can't find the answer.... (Sorry everyone I don't mean to brag....)

guyzz i m going nuts becoz i found the paper really easy
either i m goin to get 70+ or i m surely failin.......

Wow!!! Congrats to you then!! Hope you can reach your target!

 

[priya_sharma]

I actually got really nervous for the test in the first hour (I didn't even get whole number answer for the polynomials! When I practiced I usually got whole numbers), so I just do what I can till number 10, skipping numbers if I can't do it. At 3 o' clock I already finished no 10 (of course since I got nervous I skipped tons of numbers), so then I went back to the numbers that I can't do, and magically I suddenly can do most of the questions, including the aforementioned polynomial; I just noticed that I calculated them wrong. (Big thanks to God!) Thankfully when I checked my answers with my friend who studied at another school, (Yep they also took exam at the same centre as me), many of the answers were similar to one another... I was really careless on the trapezium rule though, and also the first part of the vector I can't find the answer.... (Sorry everyone I don't mean to brag....)



Wow!!! Congrats to you then!! Hope you can reach your target!

hope so........

 

[Haya Ahmed]

Hey guys please I need help here in part (ii) what are we supposed to do ?! ...

 

[Wolfgangs]

http://papers.xtremepapers.com/CIE/...S Level/Mathematics (9709)/9709_s13_qp_41.pdf

Q3 please