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    Hi can somebody please tell me what to do on this question?
    Part of the graph y=2x^3-1 is drawn
    By drawing a suitable line solve the equation 2x^3-2x-3=0
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    (Original post by lucasharrison)
    Hi can somebody please tell me what to do on this question?
    Part of the graph y=2x^3-1 is drawn
    By drawing a suitable line solve the equation 2x^3-2x-3=0
    Draw the line, y= -2x-2

    solve for x, by finding factors in > 2x^3-2x-3=0
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    (Original post by Vijay1)
    Draw the line, y= -2x-2

    solve for x, by finding factors in > 2x^3-2x-3=0
    no.

    draw the line y = 2x + 2. where they intercept, is the x value you want.
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    (Original post by chewwy)
    no.

    draw the line y = 2x + 2. where they intercept, is the x value you want.
    :rolleyes: Silly me
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    yes it does, around 1.42
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    (Original post by chewwy)
    yes it does, around 1.42
    so it does, not an obvious solution > 1.43211
 
 
 
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