Last minute math paper 4 doubt

[lightdragon]

Guys i need help with question 7 in 2006 paper 4, here is a link to the paper http://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Mathematics (0580)/0580_s06_qp_4.pdf

How to do the c) part is what i need to know! everything else f9

 

[Chucky]

okay, it seems tricky,
but it asks you to reflect first, then do the translation.
when you take k=1 let's say, you have the co-ordinates Q(-1,-2)
when you take these co-ordinates and reflect, then translate, the image co-ordinates should lie on the line y=x

i think that's what it asks, and it says that it should work for any value of k.

try that.

 

[Chucky]

I was just doing this paper a couple of hours ago, how did I miss this

 

[lightdragon]

thanks chuck

 

[shefali]

hey guys..can u confirm if mark scheme for sum number 2) d) iii paper october/november 2005 is wrong?

 

[IGCSE O/L student]

okay, it seems tricky,
but it asks you to reflect first, then do the translation.
when you take k=1 let's say, you have the co-ordinates Q(-1,-2)
when you take these co-ordinates and reflect, then translate, the image co-ordinates should lie on the line y=x

i think that's what it asks, and it says that it should work for any value of k.

try that.

u shud show, wat value u use 4 k. show dat dis works wid at least 2 values for k.

 

[shefali]

Oh it's simple you are substituting the inverse so the values are equal

 

[shefali]

Basically u get (k-2+2) and (k-3+3) therefore (k,k) hence it does...follow from the first part of the question u will understand

 

[IGCSE O/L student]

ok! i nvr did da question. so since u said u understand frm da first part of da question, it's fyn