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1. When finding coordinates, when the tangent is parrallel. How do i know which x coordiantes to sub in to find the y coordinate?
2. When finding a y coordinate don't you just sub x=0? Do you have an example question and I will take a look for you?
3. (Original post by Yousf)
When finding coordinates, when the tangent is parrallel. How do i know which x coordiantes to sub in to find the y coordinate?
Your question is vague but I think I can guess what you mean.
If you are given that the tangent at P is parallel to the line with equation y=mx+c.......
You know the gradient of the tangent is m
Differentiate the curve equation and solve for when it equals the gradient of the tangent

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4. can anyone help me out with q3,ii ?
5. this one!
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