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I understand how to use the limiting chord process to find the gradient of a curve, but how do you do it when they ask for a certain point on the curve. for example

find the gradient using the limiting chord process on the curve y=x^2 +2 at the point (1,3)

If you sub the points into the equation it's no longer y= which you need to be able to use the formula they're wanting

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# Simple differentition

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