igcse math paper 2

[Hamzeh S]

How was your exam guys paper 22 ? i think it was easy but some functions were hard what was the gradient of the parralel lines and the inverse of f?

 

[Advait Halve]

The gradient or "k" was 2.5. I left it at 1.25 but was supposed to multiply it by 2. Can't remember the inverse of f but it was the cube root of x minus something followed by -2. All in all was a splendid paper. Though I did make errors where I shouldn't have, I still expect a 64, which should make the threshold for this paper, which I expect to be in the late 50's for A*.

 

[Hamzeh S]

The gradient or "k" was 2.5. I left it at 1.25 but was supposed to multiply it by 2. Can't remember the inverse of f but it was the cube root of x minus something followed by -2. All in all was a splendid paper. Though I did make errors where I shouldn't have, I still expect a 64, which should make the threshold for this paper, which I expect to be in the late 50's for A*.

haha yeah i used 1.25 k the inverse of f i got it wrong hopefully i expect 63-65 inshallah but out of 200 how much do u expect the thereshold to be ?

 

[~`Heba`~ :)]

What was the answer for symmetry?

 

[Hamzeh S]

First one only I and second one N and I

 

[nehaloo]

no but the parallel lines will be 1.25 bcoz they r parallel so they must have the same gradient! is tht crrct?? :/

 

[~`Heba`~ :)]

El7! That's how i did it! How much did u get for the gradient in the graph?

 

[Hamzeh S]

Thats what i knw but some people say we should multiply it by 2 :1 :/ uggh i had silly mistakes

 

[~`Heba`~ :)]

@nehaloo it was 2y :/

 

[Jspake]

Heyyy.. The gradient was 1.25.. right?? And about the transformation.. was it y-invariant or X-invariant??

 

[shefali]

what about the symmetry questions?

 

[Hamzeh S]

it was shear scale factor of 2 x axis invarient line

 

[shefali]

Heyyy.. The gradient was 1.25.. right?? And about the transformation.. was it y-invariant or X-invariant??

x invariant and yes 1.25

 

[Hamzeh S]

Line Symmetry= I
Rotational Symmetry= I,N

 

[nehaloo]

yes i knw tht it was 2 y but first of all i think if there must be a change then it has to be divided by 2 to get only y and secondly if u divide or multiply u will be changing the gradient and they r parallel and I think tht this was the examiner's point :/ so wts ur opinion abt this?? :/
and another thing wt abt the f(g) x?? and btw I made more silly mistakes xSS hoping tht the curve will be low!

 

[shefali]

O has infinite lines of symmetry right? was confused a little...fg(x) were we supposed to open brackets of the (x+2) cube?

 

[~`Heba`~ :)]

I hope paper4 is easy :s

 

[nehaloo]

yes O had infinite lines of symmetry and yes i knw tht u had to open tht but wht was its final ans??

 

[Hamzeh S]

paper 4 will include vectors symmetry probability and maybe a little statistics last page sequences for sure maybe a little transformation and some graphing , areas and volumes and geomtry and mensuration hopefully it will be easy and i hope for a low grade thershold (curve)

 

[nehaloo]

i got the gradient abt -1.53 wt abt u?? hw much did u get it?