Maths paper 2.. 2012!!

[Jspake]

Hey guys,
Hope you did well today. I just wanted to clear some doubts on the following:
- There was a transformation question.. it was shear I guess. What was the invariant?? i wrote Y-axis.. not sure!
- There was another question about the gradient of two parallel lines.. was it 5/4?? (1.25)
- And one last one.. what was the inverse of the function??

 

[0Louis0]

- Shear, scale factor 2, Y-axis invariant.
- I did it 5/4 but some people are saying its 2.5, I'm really not sure.
- ³√x² - 5 - 2 .. If you can't read that it was cubic-root of (x-squared minus some number I can't remember) then minus another number (that second number was outside the cubic root)

 

[Ahmed GolD]

The invariant should be x-axis by factor 2.
The inverse should be (cube root of x-5) all -2
Btw what variant did u get I was variant 2.

 

[Ahmed GolD]

Can I also know the answers to the last whole page. The matrix question.
I think (a) 3.5
(b) +3 or -3
(c) 5

 

[Razzle-Dazzle]

Can I also know the answers to the last whole page. The matrix question.
I think (a) 3.5
(b) +3 or -3
(c) 5

That's exactly what I put but I really wasn't sure about the last one.

 

[Ahmed GolD]

If u see the matrix for stretch by factor h parallel to y axis is
(1 0)
(0 H) where h=2.
so x-3=2
x=3+2
X=5

 

[COOLmaaan]

I got the same answers as you for b) and c) however, I'm unsure about a), do u remember what the question was??

even i got these. i dont remember the matrix but i guess it was the one without an inverse..

 

[PhyZac]

even i got these. i dont remember the matrix but i guess it was the one without an inverse..

it was with 0 as determinant , think so !

 

[GetSomeLife]

it was with 0 as determinant , think so !

Yep

 

[COOLmaaan]

(Y)

 

[сᴏᴏʟ сяуѕтᴀʟѕ]

it was with 0 as determinant , think so !

Yep

aoa wr wb...
and x was equal to 3.5 right? :

 

[PhyZac]

aoa wr wb...
and x was equal to 3.5 right? :

waalikum assalam
Yep

 

[svenas]

I got the same answers as you for b) and c) however, I'm unsure about a), do u remember what the question was??

plz plz tell me is this correct:
I wrote for the TRIGONOMETRY question a)I and b) I and N

 

[Busy Buddy]

I got the same answers as you for b) and c) however, I'm unsure about a), do u remember what the question was??

can u plz tell me me how is b) +3 and -3???

 

[msn201]

Guyzz for the question about the are and the volume for the model and the real one did you square the area and cubed the volume or u just solved it normally?

 

[Busy Buddy]

Guyzz for the question about the are and the volume for the model and the real one did you square the area and cubed the volume or u just solved it normally?

I dont know hw I did but it was rong! wat did u get the value for k?

 

[Busy Buddy]

That's right, I wrote the same!


I dont remember the question exactly but I remember getting +3 and -3 as the answers! :/

did we have to use any formula? hw is the value 4 k 1.25? din we have to divide by 2?

 

[msn201]

i don't really remember but all what i can remember is that i didn't square nor cubed but there are some people who squared *-*

 

[we will do it]

was it shear or strech
and if we wrote the name wrong n INVARIENT LINE N S.F CORRECT R WE GOING TO SCORE MARKS FOR IT

 

[0Louis0]

plz plz tell me is this correct:
I wrote for the TRIGONOMETRY question a)I and b) I and N

Correct

was it shear or strech
and if we wrote the name wrong n INVARIENT LINE N S.F CORRECT R WE GOING TO SCORE MARKS FOR IT

Yes, the question has 3 marks. Type (which is shear), invariant (which is Y) and scale (which is 2), you a mark on each whether they're all correct or not