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# Help with this question. watch

1. I'm a bit stuck on this MAT question.

https://gyazo.com/99a4067810c8c1a7e760783c44ff851f

Here is my working.

https://scontent-lhr3-1.xx.fbcdn.net...ff&oe=562EC9A8

2. (Original post by Louisb19)
I'm a bit stuck on this MAT question.

https://gyazo.com/99a4067810c8c1a7e760783c44ff851f

Here is my working.

https://scontent-lhr3-1.xx.fbcdn.net...ff&oe=562EC9A8

as most of us do not have intuitive/working experience in the transformation y=f(x2) form the equation of the curve between -1 and 1

then replace x by x2 -1 and then it will be obvious
3. (Original post by Louisb19)
I'm a bit stuck on this MAT question.

https://gyazo.com/99a4067810c8c1a7e760783c44ff851f

Here is my working.

https://scontent-lhr3-1.xx.fbcdn.net...ff&oe=562EC9A8

EDIT

I just saw the working

yes
4. (Original post by TeeEm)
as most of us do not have intuitive/working experience in the transformation y=f(x2) form the equation of the curve between -1 and 1

then replace x by x2 -1 and then it will be obvious
I understand how you could let f(x) = -|x| +1 and therefore f(x^2 -1) = -|x^2 -1| + 1, however this test only includes C1 - 2 content so using C3 feels like cheating. The mark scheme has a different way of doing it however I don't really understand it.

https://gyazo.com/a152f9c12d1d02d032a5387bbaa02bee

Thanks TeeEm!

EDIT: Maybe you could make to separate equations for f(x) between 1 to 0 and 0 to -1?
5. (Original post by Louisb19)
I understand how you could let f(x) = -|x| +1 and therefore f(x^2 -1) = -|x^2 -1| + 1, however this test only includes C1 - 2 content so using C3 feels like cheating. The mark scheme has a different way of doing it however I don't really understand it.

https://gyazo.com/a152f9c12d1d02d032a5387bbaa02bee

Thanks TeeEm!

Fair enough.

(I thought maths is maths. I guess Maths did not know that this is C3, but next time I see maths I will let maths know.)
Attached Images

6. (Original post by TeeEm)
Fair enough.

(I thought maths is maths. I guess Maths did not know that this is C3, but next time I see maths I will let maths know.)
Do you understand the solution in the mark scheme (the one I linked)? Doesn't make sense to me.
7. (Original post by Louisb19)
Do you understand the solution in the mark scheme (the one I linked)? Doesn't make sense to me.
I did not look at it as I am doing work at the moment and occasionally I look into the room. I will take a look in a while if no-one else looks because I am in the middle of painful algebra

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