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    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

    I got the right answer however I think it was by chance and not because I did it correctly. Please help!
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    (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

    I got the right answer however I think it was by chance and not because I did it correctly. Please help!
    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
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    (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

    I got the right answer however I think it was by chance and not because I did it correctly. Please help!
    EDIT

    I just saw the working

    yes
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    (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?
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    (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.)
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    (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.
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    (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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