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Maths question: Tangents and normals to a curve? watch

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    The curve y=x^3-8 cuts the x-axis at the point C.

    A. Find the coordinates of C
    B. Find the equation of the normal to the curve at the point C

    I understand part B but I don't know what to do on part A. Please help because without part A, I can't do part B. Thank you
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    At the x-axis, what is y?
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    I don't know but i posted every bit of the question here.
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    (Original post by nicecookie)
    I don't know but i posted every bit of the question here.
    At the x-axis y=?

    I am sure that you do know

    It would not be part of the question
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    For Point C to cut the x axis, y=0

    Rearrange to find x
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    (Original post by Catiexx)
    For Point C to cut the x axis, y=0

    Rearrange to find x
    Thank you!! I feel so dumb now, haha I know what to do
 
 
 
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Updated: October 30, 2011

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