Now use the chain-rule.

How did you get this result. Btw I've got 1.(ii)

2. Find the gradient of the curve at the point (1,2)

Answer I got = 3

If I were you I would have expanded the brackets before differentiation (otherwise you have to use the product rule and the chain-rule)3. Differentiate

(i)

Answer I got =

You have to use the quotient rule (what you obviously attempted to do), but you must have made a sign mistake:(ii)

Answer I got =

No. See my remarks.Are my answers for the ones completed correct?