The curve C C\,C has equation y=13x3−9x+1\displaystyle y = \frac{1}{3}x^3 - 9x + 1y=31x3−9x+1
Find dydx\displaystyle \frac{dy}{dx}dxdy
Find the range of values of x x\,x for which C C\,C has a negative gradient.
Practise Edexcel IGCSE Maths Differentiation with exam-style questions for IGCSE Maths. 5 questions, matched to the Edexcel IGCSE Maths (4MA1) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.