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1. 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
2. (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
3. (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.
4. (Original post by chewwy)
no.

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

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